Section: Social Complexity / Transport infrastructure
Variable: Bridge (All coded records)
Talking about Transport infrastructure, bridges refers to bridges built and/or maintained by the polity (that is, code 'present' even if the polity did not build a bridge, but devotes resources to maintaining it).  
Bridge
#  Polity  Coded Value Tags Year(s) Edit Desc
1 Early Qing present Confident Expert -
During the early Qing, the development of Hangzhou involved the digging and dredging of rivers in the city as well as the river outside Zhangyang Gate, the river from Mija Bridge to Guojun Bridge, the river from Jionglong Bridge to Zhongguan Bridge, the river from Houchou Watergate to Guojun Bridge, and up to the river from Pocang Bridge to Gonguandong Bridge. This project led to an expansion of the rivers which had become clean and clear, flowing smoothly, allowing an increase in boat traffic. [1]

[1]: (Fu and Cao 2019, p.329)


2 Late Qing present Confident Expert -
e.g. Yongqing Bridge and Santiao Bridge [1] The Board of Works was responsible for maintaining all official buildings, granaries, official communication routes, dykes, dams, and irrigation systems. [2]

[1]: (Wang 2016, 212, 218)

[2]: (Smith 2015, 103)


3 Early Formative Basin of Mexico unknown Suspected Expert -
regional and long-distance trade (crossing rivers) was common, [1] [2] but no evidence of bridges exists in the limited archaeological record of the Early Formative

[1]: Grove, David C. (2000) "The Preclassic Societies of the Central Highlands of Mesoamerica." In Richard Adams and Murdo MacLeod (eds.), The Cambridge History of The Native Peoples of the Americas, Volume II: Mesoamerica, Part I. Cambridge: Cambridge University Press, pg.122-151.

[2]: Plunket, P., & Uruñuela, G. (2012). Where east meets west: the Formative in Mexico’s central highlands. Journal of Archaeological Research, 20(1), 1-51.


4 Middle Formative Basin of Mexico unknown Suspected Expert -
regional and long-distance trade (crossing rivers) was common, [1] [2] but no evidence of bridges exists in the limited archaeological record of the Early Formative

[1]: Grove, David C. (2000) "The Preclassic Societies of the Central Highlands of Mesoamerica." In Richard Adams and Murdo MacLeod (eds.), The Cambridge History of The Native Peoples of the Americas, Volume II: Mesoamerica, Part I. Cambridge: Cambridge University Press, pg.122-151.

[2]: Plunket, P., & Uruñuela, G. (2012). Where east meets west: the Formative in Mexico’s central highlands. Journal of Archaeological Research, 20(1), 1-51.


5 Late Formative Basin of Mexico unknown Suspected Expert -
Regional and long-distance trade (crossing rivers) was common, [1] [2] but no evidence of bridges exists in the limited archaeological record of the Formative

[1]: Grove, David C. (2000) "The Preclassic Societies of the Central Highlands of Mesoamerica." In Richard Adams and Murdo MacLeod (eds.), The Cambridge History of The Native Peoples of the Americas, Volume II: Mesoamerica, Part I. Cambridge: Cambridge University Press, pg.122-151.

[2]: Plunket, P., & Uruñuela, G. (2012). Where east meets west: the Formative in Mexico’s central highlands. Journal of Archaeological Research, 20(1), 1-51.


6 Terminal Formative Basin of Mexico unknown Suspected Expert -
Regional and long-distance trade (crossing rivers) was common, [1] [2] but no evidence of bridges exists in the limited archaeological record of the Early Formative

[1]: Grove, David C. (2000) "The Preclassic Societies of the Central Highlands of Mesoamerica." In Richard Adams and Murdo MacLeod (eds.), The Cambridge History of The Native Peoples of the Americas, Volume II: Mesoamerica, Part I. Cambridge: Cambridge University Press, pg.122-151.

[2]: Plunket, P., & Uruñuela, G. (2012). Where east meets west: the Formative in Mexico’s central highlands. Journal of Archaeological Research, 20(1), 1-51.


7 Hawaii I unknown Suspected Expert -
-
8 Hawaii II absent Inferred Expert -
-
9 Hawaii III unknown Suspected Expert -
-
10 Kingdom of Hawaii - Kamehameha Period unknown Suspected Expert -
-
11 Kingdom of Hawaii - Post-Kamehameha Period present Confident -
“Road making as practiced in Hawaii in the middle of the nineteenth century was a very superficial operation, in most places consisting of little more than clearing a right of way, doing a little rough grading, and supplying bridges of a sort where they could not be dispensed with.” [1]

[1]: (Kuykendall 1938: 26) Kuykendall, Ralph Simpson. 1938. The Hawaiian Kingdom. Honolulu: University Press of Hawaii. http://archive.org/details/hawaiiankingdom0002kuyk. https://www.zotero.org/groups/1051264/seshat_databank/items/QJ4Z7AAB


12 Cahokia - Early Woodland absent Confident Expert -
There were no bridges in prehistoric North America.
13 Cahokia - Middle Woodland absent Confident Expert -
There were no bridges in prehistoric North America.
14 Cahokia - Late Woodland I absent Confident Expert -
There were no bridges in prehistoric North America.
15 Cahokia - Late Woodland II absent Confident Expert -
There were no bridges in prehistoric North America.
16 Cahokia - Late Woodland III absent Confident Expert -
There were no bridges in prehistoric North America.
17 Cahokia - Emergent Mississippian I absent Confident Expert -
There were no bridges in prehistoric North America.
18 Cahokia - Sand Prairie absent Confident Expert -
There were no bridges in prehistoric North America.
19 Oneota absent Confident Expert -
Inference approved by Peter Peregrine.
20 Early Illinois Confederation absent Inferred Expert -
Bridge present in 1735 but probably built by the French settlers. "The 1735 map also illustrates a bridge over Riviere du Pont connecting with the road to Falling Springs, where the missionaries had built a water mill." [1]

[1]: (Gums et al 1991, 86)


21 Cahokia - Lohman-Stirling absent Confident Expert -
There were no bridges in prehistoric North America.
22 Cahokia - Moorehead absent Confident Expert -
There were no bridges in prehistoric North America.
23 Cahokia - Emergent Mississippian II absent Confident Expert -
There were no bridges in prehistoric North America.
24 Funan I present Inferred Expert -
Stone bridges date to classical Angkor, but it is likely that bridges were made using wood. As Hendrickson points out: The Phnom Sres (1022 CE) inscription found in the Battambang region makes reference to the construction of reservoirs along roads and a wooden bridge across a river (Jacques 1968:616-617). [1]

[1]: (Hendrickson 2007, p. 123)


25 Funan II present Inferred Expert -
Stone bridges date to classical Angkor, but it is likely that bridges were made using wood. As Hendrickson points out: The Phnom Sres (1022 CE) inscription found in the Battambang region makes reference to the construction of reservoirs along roads and a wooden bridge across a river (Jacques 1968:616-617). [1]

[1]: (Hendrickson 2007, p. 123)


26 Early Angkor present Confident Expert -
The Phnom Sres (1022 CE) inscription found in the Battambang region makes reference to the construction of reservoirs along roads and a wooden bridge across a river (Jacques 1968:616-617). [1]

[1]: (Hendrickson 2007, p. 123)


27 Classical Angkor present Confident Expert -
‘Arched remains of the Angkor period bridge, Spean Thma, which went over the Siem Reap River at the main approach to Angkor Thom, the last capital of the Khmer Empire. The original bridge consisted of a total of 14 arches.’ [1] ’[Jayavarman VII] saw to the construction of many other buildings across his empire, including roads with guesthouses every 9.3 miles (15 km) that linked Angkor with viceregal centers such as Phimai. He built bridges, hospitals, and mausolea for his parents and son.’ [2] ’The main entrance is on the west. The entire complex is surrounded by a wall on the inner side of the moat. To reach the shrine, one crosses the western moat via a bridge of laterite surfaced with sandstone, leading to a sandstone gate with main entrances for pedestrians and side entrances that would have been accessible by carts and other wheeled vehicles. Since no other major temples were constructed during this period, it seems likely that most of the kingdom’s man- power and other resources were devoted to this single project.’ [3] ’The principal shrine is located at the eastern end of the square en- closure. To reach the main temple, visitors have to follow an axial pathway in the form of a stone bridge half a kilometer (1,600 feet) in length, reminiscent of the layout of Beijing’s Forbidden City. This pathway is fringed with balustrades in the form of a giant serpent and is flanked by rectangular baray. Branches off the main walkway lead to pools, stone structures called libraries, and other now-vanished structures.’ [3]

[1]: (Engelhardt 1995, p.23)

[2]: (Hingham 2012, p. 186)

[3]: (Miksic 2007, p. 23)


28 Late Angkor present Inferred Expert -
“Dumarçay (1992: 133-4) argues, using the model of Spean Thma to the east of Angkor Thom (which is constructed from parts of a thirteenth-century temple), that bridges would have been made of wood on a latérite skirt and then replaced with stone during the thirteenth century." [1]

[1]: (Hendrickson 2010, 491)


29 Khmer Kingdom present Confident Expert -
‘Arched remains of the Angkor period bridge, Spean Thma, which went over the Siem Reap River at the main approach to Angkor Thom, the last capital of the Khmer Empire. The original bridge consisted of a total of 14 arches.’ [1] ’[Jayavarman VII] saw to the construction of many other buildings across his empire, including roads with guesthouses every 9.3 miles (15 km) that linked Angkor with viceregal centers such as Phimai. He built bridges, hospitals, and mausolea for his parents and son.’ [2] Furthermore, a Dutch account from 1644 informs of the construction of two wooden bridges in just a few days to trap the Dutch ships in the Mekong during hostilities between the two countries. The bridges were made 220 m long and 7.5 m wide. [3]

[1]: (Engelhardt 1995, p.23)

[2]: (Hingham 2012, p. 186)

[3]: (Van der Kraan 2009 :52)


30 Ayutthaya present Confident Expert -
31 Rattanakosin present Inferred Expert -
Inferred from the fact that bridges existed in Ayutthaya [1] and it does not seem like a type of technology that can be easily forgotten.

[1]: http://www.ayutthaya-history.com/Geo_Street_BridgesKhaoPluak.html


32 Medang Kingdom present Confident Expert -
[1]

[1]: (Hall in Tarling 1993, 206)


33 Majapahit Kingdom unknown Suspected Expert -
-
34 Mataram Sultanate present Confident Expert -
By the mid-seventeeenth century there were permanent bridges. [1]

[1]: (Ricklefs 1993, 92)


35 Chuuk - Early Truk present Confident Expert -
According to SCCS variable 14 ’Routes of Land Transport’ ’2’ or ’improved trails, for porters or animal carriers’ were present. We are unsure whether this applies to the late 18th and early 19th centuries as well. Writing in the colonial period, Bollig mentions bridges: ’The Truk natives have the reputation of being the laziest and dirtiest people of the South Seas. /220/ Actually they do not hurt themselves with work. Most of them work only as much as they have to. Eating and sleeping, and eating again, fill up their time. And their uncleanliness is indescribable. It is almost as if they had no feeling at all for any order and cleanliness. Around the house filth, rags, food remains; in it, the same. To be sure, they have a word for broom ( böbö), but rarely use it. They also bathe, even several times a day, and yet are never clean. If a tree falls across the path, it remains there. Everybody who takes the path has to climb over it. If a bridge collapses, it remains for months and years, until it is replaced. [Page 243] Training the islanders in orderly activity, punctuality, and cleanliness will take much time and effort.’ [1] We have assumed that tree or liana bridges were present in some form in the pre-colonial period as well. This is open to re-consideration.

[1]: Bollig, Laurentius 1927. “Inhabitants Of The Truk Islands: Religion, Life And A Short Grammar Of A Micronesian People”, 242


36 Chuuk - Late Truk present Confident Expert -
According to SCCS variable 14 ’Routes of Land Transport’ ’2’ or ’improved trails, for porters or animal carriers’ were present. Bollig mentions bridges: ’The Truk natives have the reputation of being the laziest and dirtiest people of the South Seas. /220/ Actually they do not hurt themselves with work. Most of them work only as much as they have to. Eating and sleeping, and eating again, fill up their time. And their uncleanliness is indescribable. It is almost as if they had no feeling at all for any order and cleanliness. Around the house filth, rags, food remains; in it, the same. To be sure, they have a word for broom ( böbö), but rarely use it. They also bathe, even several times a day, and yet are never clean. If a tree falls across the path, it remains there. Everybody who takes the path has to climb over it. If a bridge collapses, it remains for months and years, until it is replaced. [Page 243] Training the islanders in orderly activity, punctuality, and cleanliness will take much time and effort.’ [1]

[1]: Bollig, Laurentius 1927. “Inhabitants Of The Truk Islands: Religion, Life And A Short Grammar Of A Micronesian People”, 242


37 Prepalatial Crete unknown Suspected Expert -
-
38 Old Palace Crete unknown Suspected Expert -
-
39 New Palace Crete present Confident Expert -
-
40 Monopalatial Crete present Confident Expert -
-
41 Postpalatial Crete present Confident Expert -
-
42 Final Postpalatial Crete present Confident Expert -
-
43 Geometric Crete present Confident Expert -
-
44 Archaic Crete present Confident Expert -
-
45 Classical Crete present Confident Expert -
-
46 Hellenistic Crete present Confident Expert -
-
47 Roman Empire - Principate present Confident Expert -
"Legionaries’ engineering and construction skills were put to use for obviously military purposes (fortifications), but also sometimes for improving infrastructure by building canals or bridges, or in mining and quarrying." [1] Via Flaminia crossed Nera River with Ponte d’Augusto, spans from 52-105 feet. Pont-Saint-Martin, east of Aosta, span of 35.6 meters. 104 CE Alcantara bridge, span 28.8 meters, height 62 meters. Puente Romano, Merida, total length 721 meters (not built in one go, sections added over time) [2] Major repair of roads, bridges and harbours under Trajan (98-117 CE). [3] .

[1]: (Pollard and Berry 2012, 48)

[2]: (Gagarin and Fantham 2009, 25)

[3]: (Canciello 2005)


48 Roman Empire - Dominate present Confident Expert -
Bridges present from earlier periods and maintained during Roman Dominate.
49 East Roman Empire present Confident Expert -
-
50 Byzantine Empire I present Confident Expert -
Preiser-Kapeller says present. [1] Bridges. [2]

[1]: (Johannes Preiser-Kapeller 2015) Institute for Medieval Research, Division of Byzantine Research, Austrian Academy of Sciences)

[2]: (Belke 2008, 295-308) Jeffreys E, Haldon J and Cormack R eds. 2008. The Oxford Handbook of Byzantine Studies. Oxford University Press. Oxford.


51 The Emirate of Crete present Confident Expert -
-
52 Byzantine Empire II present Confident Expert -
Preiser-Kapeller says present. [1] Bridges. [2]

[1]: (Preiser-Kapeller 2015) Institute for Medieval Research, Division of Byzantine Research, Austrian Academy of Sciences)

[2]: (Belke 2008, 295-308) Jeffreys E, Haldon J and Cormack R eds. 2008. The Oxford Handbook of Byzantine Studies. Oxford University Press. Oxford.


53 Byzantine Empire III present Confident Expert -
Preiser-Kapeller says present. [1] Bridges. [2]

[1]: (Preiser-Kapeller 2015) Institute for Medieval Research, Division of Byzantine Research, Austrian Academy of Sciences)

[2]: (Belke 2008, 295-308) Jeffreys E, Haldon J and Cormack R eds. 2008. The Oxford Handbook of Byzantine Studies. Oxford University Press. Oxford.


54 Cuzco - Late Formative unknown Suspected Expert -
-
55 Cuzco - Early Intermediate II unknown Suspected Expert -
-
56 Wari Empire present Inferred Expert -
"In the case of the Wari Empire, a major administrative structure was needed, but there was no local political organization to use as a foundation for this structure. As a result, it had to build from the ground up: a large center, small satellite centers, terraces to increase agricultural production, new villages nearer the terraced zone, a road system, a bridge, etc." [1] . Example from the Carahuarazo valley.

[1]: (Schreiber 1987, 281)


57 Inca Empire present Confident Expert -
Officials responsible for bridges [1] Rope suspension bridges on thick grass cables which had to be remade every year. [2] Example at the Apurimac river: Keshwa Cacha. [3]

[1]: (Bauer 2004, 22)

[2]: (Kaufmann and Kaufmann 2012)

[3]: http://www.slate.com/articles/life/world_of_wonders/2011/02/the_last_incan_grass_bridge.html


58 Spanish Empire I present Confident Expert -
"Churches, town halls, bridges, and public works of all sorts were created in the image of Escorial well into the second quarter of the seventeenth century." [1] "A majority of deputies to the Cortes of 1586-8 criticised the government for authorising too many schemes for bridges, without offering any funds of its own to help along the work." [2]

[1]: (Escobar 2016, 260) Escobar, Jesús. 2016. "Architecture in the Age of the Spanish Habsburgs." Journal of the Society of Architectural Historians 75(3): 258-261. https://www.zotero.org/groups/seshat_databank/items/itemKey/F2BFHI82

[2]: (Casey 2002, 11) Casey, James. 2002. Early Modern Spain: A Social History. New York: Routledge. https://www.zotero.org/groups/seshat_databank/items/itemKey/2SNTRSWT


59 Deccan - Neolithic unknown Suspected Expert -
-
60 Magadha - Maurya Empire present Inferred Expert -
The Royal road must have crossed some streams or rivers and required bridge-building.
61 Hoysala Kingdom unknown Suspected Expert -
-
62 Kampili Kingdom unknown Suspected Expert -
Likely had the ability to construct bridges.
63 Vijayanagara Empire present Confident Expert -
[1]

[1]: Burton Stein, The New Cambridge History of India: Vijayanagara (1990), p. 34


64 Mughal Empire present Confident Expert -
Bridges were constructed to allow faster transportation across land. [1]

[1]: Link


65 British Empire II present Confident Expert -
Isambard Kingdom Brunel engineered many bridges.
66 Haudenosaunee Confederacy - Early absent Confident Expert -
Morgan describes the system of trails used by the Iroquois, but fails to mention bridges and other more permanent structures: ’The principal villages of the Iroquois, in the days of aboriginal dominion, were connected by well-beaten trails. These villages were so situated that the central trail, which started from the Hudson at the site of Albany, passed through those of the Mohawks and Oneidas; and, crossing the Onondaga valley and the Cayuga country, a few miles north of the chief settlements of these nations, it passed through the most prominent villages of the Senecas, in its route to the valley of the Genesee. After crossing this celebrated valley, it proceeded westward to lake Erie, coming out upon it at the mouth of Buffalo creek, on the present site of Buffalo.’ [1] ’We have thus followed the great Indian trail, Wä-a-gwen[unknown] -ne-yu, through the State, from the Hudson to lake Erie; noticing, as far as ascertained, the principal stopping-places on the route. To convey an adequate impression of the forest scenery, which then overspread the land, is beyond the power of description. This trail was traced through the over-hanging forest for almost its entire length. In the trail itself, there was nothing particularly remarkable. It was usually from twelve to eighteen inches wide, and deeply worn in the ground; varying in this respect from three to six, and even twelve inches, depending upon the firmness of the soil. The large trees on each side were frequently marked with the hatchet. This well-beaten footpath, which no runner, nor band of warriors could mistake, had doubtless been trodden by successive generations from century to century. It had, without question, been handed down from race to race, as the natural line of travel, geographically considered, between the Hudson and lake Erie. While it is scarcely possible to ascertain a more direct route than the one pursued by this trail, the accuracy with which it was traced from point to point, to save distance, is extremely surprising. It proved, on the survey of the country, to have been so judiciously selected that the turnpike was laid out mainly on the line of this trail, from one extremity of the State to the other. In addition to this, all the larger cities and villages west of the Hudson, with one or two exceptions, have been located upon it. As an independent cause, this forest highway of the Iroquois doubtless determined the establishment of a number of settlements, which have since grown up into cities and villages.’ [2]

[1]: Morgan, Lewis Henry, and Herbert M. Lloyd 1901. “League Of The Ho-De’-No-Sau-Nee Or Iroquois. Vol. Ii”, 80

[2]: Morgan, Lewis Henry, and Herbert M. Lloyd 1901. “League Of The Ho-De’-No-Sau-Nee Or Iroquois. Vol. Ii”, 94


67 Haudenosaunee Confederacy - Late absent Confident Expert -
Morgan describes the system of trails used by the Iroquois, but fails to mention bridges and other more permanent structures: ’The principal villages of the Iroquois, in the days of aboriginal dominion, were connected by well-beaten trails. These villages were so situated that the central trail, which started from the Hudson at the site of Albany, passed through those of the Mohawks and Oneidas; and, crossing the Onondaga valley and the Cayuga country, a few miles north of the chief settlements of these nations, it passed through the most prominent villages of the Senecas, in its route to the valley of the Genesee. After crossing this celebrated valley, it proceeded westward to lake Erie, coming out upon it at the mouth of Buffalo creek, on the present site of Buffalo.’ [1] ’We have thus followed the great Indian trail, Wä-a-gwen[unknown] -ne-yu, through the State, from the Hudson to lake Erie; noticing, as far as ascertained, the principal stopping-places on the route. To convey an adequate impression of the forest scenery, which then overspread the land, is beyond the power of description. This trail was traced through the over-hanging forest for almost its entire length. In the trail itself, there was nothing particularly remarkable. It was usually from twelve to eighteen inches wide, and deeply worn in the ground; varying in this respect from three to six, and even twelve inches, depending upon the firmness of the soil. The large trees on each side were frequently marked with the hatchet. This well-beaten footpath, which no runner, nor band of warriors could mistake, had doubtless been trodden by successive generations from century to century. It had, without question, been handed down from race to race, as the natural line of travel, geographically considered, between the Hudson and lake Erie. While it is scarcely possible to ascertain a more direct route than the one pursued by this trail, the accuracy with which it was traced from point to point, to save distance, is extremely surprising. It proved, on the survey of the country, to have been so judiciously selected that the turnpike was laid out mainly on the line of this trail, from one extremity of the State to the other. In addition to this, all the larger cities and villages west of the Hudson, with one or two exceptions, have been located upon it. As an independent cause, this forest highway of the Iroquois doubtless determined the establishment of a number of settlements, which have since grown up into cities and villages.’ [2] We are unsure about the infrastructural changes brought about by white settlers in the area.

[1]: Morgan, Lewis Henry, and Herbert M. Lloyd 1901. “League Of The Ho-De’-No-Sau-Nee Or Iroquois. Vol. Ii”, 80

[2]: Morgan, Lewis Henry, and Herbert M. Lloyd 1901. “League Of The Ho-De’-No-Sau-Nee Or Iroquois. Vol. Ii”, 94


68 Canaan absent Inferred Expert -
Bridges were absent during the Iron Age, [1] and there are no references to their presence earlier.

[1]: Dorsey (1991).


69 Phoenician Empire absent Inferred Expert -
Bridges were absent in neighboring Iron-Age Israel. [1]

[1]: Dorsey (1991).


70 Yisrael absent Inferred Expert -
Probably absent according to Dorsey. [1]

[1]: Dorsey (1991).


71 Neo-Assyrian Empire present Confident Expert -
-
72 Achaemenid Empire present Confident Expert -
"Mandorcles, another engineer of the Darius period, constructed a bridge over Begas Bosporus to allow the army to pass over. Bolts and nuts were used to fix the boards in its construction." [1] "Darius crossed into Europe (in about 513) over a pontoon bridge built by his Samian engineer, Mandrocles (a feat not rivaled until 1973), which continued the royal road into Europe." [2]

[1]: (Angelakis, Mays and Koutsoyiannis 2012, 94) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012. Evolution of Water Supply Through the Millennia. IWA Publishing.

[2]: (Shahbazi 2012, 127) Shahbazi, A Shapour. The Archaemenid Persian Empire (550-330 BCE) Daryaee, Touraj. ed. 2012. The Oxford Handbook of Iranian History. Oxford University Press.


73 Seleucids unknown Suspected Expert -
-
74 Ptolemaic Kingdom I present Inferred Expert -
-
75 Yehuda present Confident Expert -
A large bridge spanned the Tyropoeon Valley, connecting the palace and the Temple Mount to the Upper City of Jerusalem, which is believed to have been built by the early Hasmoneans. This was destroyed during the siege of Pompey in 65 BCE by the city’s defenders.
76 Early A'chik absent Confident Expert -
The A’chik initially used trails only. Sinha reports temporary bridges, but only for the second half of the 20th century: ‘There is but one cart road running from Bagmara to Damra via Tura, the headquarters of the district. It is a fair-weather road for vehicular traffic. In the rains, however, most of the temporary bridges become unsuitable for traffic. The other short roads run from Tura on to Phulbari and the other to Mankachar, the border region on the north and west of the district. There is a camel track running very close to the central ridge connecting Damra with Tura being linked with Siju. The Assam Trunk Road runs on the north of the district. The inhabitants of the place usually have to walk over the hills following the foot tracks to go from one place to another. Where the rivers or rivulets are sufficiently deep, people use dugout boats to cover the distance when necessary. Towards the centre of the district, boats as a means of conveyance are very risky. The slopes are too steep, and the boulders under the surface of the water are too big for safe plying of boats.’ [1]

[1]: Sinha, Tarunchandra 1966. “Psyche Of The Garos”, 1


77 Late A'chik absent Confident Expert -
According to SCCS variable 14 ’Routes of Land Transport’ only ’unimproved trails’ were used for land transport, not roads. The A’chik initially used trails only. Sinha reports temporary bridges, but at a later field date than the time period covered here: ‘There is but one cart road running from Bagmara to Damra via Tura, the headquarters of the district. It is a fair-weather road for vehicular traffic. In the rains, however, most of the temporary bridges become unsuitable for traffic. The other short roads run from Tura on to Phulbari and the other to Mankachar, the border region on the north and west of the district. There is a camel track running very close to the central ridge connecting Damra with Tura being linked with Siju. The Assam Trunk Road runs on the north of the district. The inhabitants of the place usually have to walk over the hills following the foot tracks to go from one place to another. Where the rivers or rivulets are sufficiently deep, people use dugout boats to cover the distance when necessary. Towards the centre of the district, boats as a means of conveyance are very risky. The slopes are too steep, and the boulders under the surface of the water are too big for safe plying of boats.’ [1] [There was precious little such infrastructure in the mid 50’s, so I suppose there was not much earlier. There was a one lane gravel/dirt road up to Tura when I was there.]

[1]: Sinha, Tarunchandra 1966. “Psyche Of The Garos”, 1


78 Akan - Pre-Ashanti absent Confident Expert -
-
79 Ashanti Empire absent Confident Expert -
-
80 Icelandic Commonwealth absent Confident Expert -
’Maintaining bridges (and also ferries) was the duty of the neighbouring farmer, not the state.’ [1]

[1]: Árni Daniel Júlíusson and Axel Kristissen 2017, pers. comm. to E. Brandl and D. Mullins


81 Kingdom of Norway II absent Confident Expert -
There were a few bridges, but these were not polity owned. [1]

[1]: Árni Daniel Júlíusson and Axel Kristissen 2017, pers. comm. to E. Brandl and D. Mullins


82 Kachi Plain - Aceramic Neolithic unknown Suspected Expert -
-
83 Kachi Plain - Ceramic Neolithic unknown Suspected Expert -
-
84 Kachi Plain - Chalcolithic unknown Suspected Expert -
-
85 Kachi Plain - Pre-Urban Period unknown Suspected Expert -
-
86 Kachi Plain - Urban Period I unknown Suspected Expert -
-
87 Kachi Plain - Urban Period II unknown Suspected Expert -
-
88 Kachi Plain - Post-Urban Period present Inferred Expert -
-
89 Parthian Empire I present Confident Expert -
According to ancient authors the Parthians built caravanserei and constructed bridges to encourage trade. [1]

[1]: (Raschke 1976, 820) Raschke, Manfred G. in Haase, Wolfgang ed. 1976. Politische Geschichte (Provinzen und Randvölker: Mesopotamien, Armenien, Iran, Südarabien, Rom und der Ferne Osten). Walter de Gruyter.


90 Kushan Empire unknown Suspected Expert -
-
91 Sasanid Empire I present Confident Expert -
Stone bridge 500 meters in extent. [1] "A number of bridges built during Shapur I’s reign had dual utility, meaning that the bridges foundations were constructed in such a manner as to enable collection of water, while the main structure joined the two banks of the river." [2]

[1]: (Nikitin 1996, 65) Nikitin, A. V. Customs, Arts and Crafts. in Litvinsky, B. A. ed. and Iskender-Mochiri, I. ed. 1996. History of Civilizations of Central Asia. Volume III. The crossroads of civilizations: A.D. 250 to 750. pp.59-80. unesdoc.unesco.org/images/0010/001046/104612e.pdf

[2]: (Mahmoudian and Mahmoudian 2012, 95) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012. Evolution of Water Supply Through the Millennia. IWA Publishing.


92 Hephthalites unknown Suspected Expert -
-
93 Sasanid Empire II present Confident Expert -
[1] "A number of bridges built during Shapur I’s reign had dual utility, meaning that the bridges foundations were constructed in such a manner as to enable collection of water, while the main structure joined the two banks of the river." [2]

[1]: (Daryaee 2009, Plate 17) Daryaee, Touraj. 2009. Sasanian Persia: The Rise and Fall of an Empire. I.B. Tauris. London.

[2]: (Mahmoudian and Mahmoudian 2012, 95) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012. Evolution of Water Supply Through the Millennia. IWA Publishing.


94 Umayyad Caliphate present Confident Expert -
Boat bridge over river Nile. [1] "Bridge building and renovation was an essential part of imperial building programs in the Islamic lands ... Many early bridges were decorated with stone plaques that commerated their patron." [2]

[1]: (Raymond 2000, 21)

[2]: ’Bridge’ in Bloom and Blair, eds. 2009, p.304.


95 Abbasid Caliphate I present Confident Expert -
The bridges of Samarra are an example of Bridge making during the Abassid Caliphate. Its inscriptions and brickwork stand out. [1] [2]

[1]: Osman S. A. Ismail (1968). The founding of a new capital: Sāmarrā’. Bulletin of the School of Oriental and African Studies, 31, pp 1-13. provides further evidence of bridge building.

[2]: Bloom, Jonathan M., and Sheila Blair, eds. The Grove Encyclopedia of Islamic Art and Architecture p. 334


96 Ghur Principality present Confident Expert -
Baked-brick bridge. [1]

[1]: Thomas, David. Firuzkuh: the summer capital of the Ghurids http://www.academia.edu/188837/Firuzkuh_the_summer_capital_of_the_Ghurids


97 Delhi Sultanate present Confident Expert -
During the reign of Sultan Firuz Shah (1351-1388 CE), "contemporary writers have noted with pride and joy that beautiful edifices were put up, including bridges, aqueducts, lakes, cisterns and irrigation channels." [1]

[1]: Siddiqui, I. H. (1986). Water works and irrigation system in India during pre-Mughal times. Journal of the Economic and Social History of the Orient/Journal de l’histoire economique et sociale de l’Orient, 52-77, p58.


98 Durrani Empire absent Confident Expert -
-
99 Asuka present Confident Expert -
[1]

[1]: Brown, D., 1993.The Cambridge History of Japan, vol. 2.Cambridge: Cambridge University Press, 250.


100 Heian present Inferred Expert -
’Like their provincial counterparts, the offices were responsible for the entire range of government in their jurisdictions, including the compilation and maintenance of household registers; the collection of taxes; police and judicial matters; the repair and maintenance of canals, ditches, bridges, and quarter walls’ [1]

[1]: Shively, Donald H. and McCullough, William H. 2008. The Cambridge History of Japan Volume 2: Heian Japan. Cambridge Histories Online Cambridge University Press.p.170


101 Kamakura Shogunate present Confident Expert -
‘In 1212, a meeting was held between the regent Yoshitoki, Oe Hiromoto, and monchujo director Miyoshi Yasunobu over the repair of a bridge in Kamakura (AK1212/2/18).’ [1]

[1]: Mass, Jeffrey P. (ed). 1995.Court and Bakufu in Japan: Essays in Kamakura History. Stanford University Press.p.170


102 Ashikaga Shogunate present Confident Expert -
’In the 1430’s, a Korean envoy was surprised to discover the prevalent use of money in Muromachi Japan. Even those traveling from one end of the country to the other, he noted, did not carry provisions because coins were accepted everywhere at inns and post stations and even by toll collectors at bridges [1]

[1]: Yamamura, Kozo (ed). 2008. The Cambridge History of Japan. Vol. 3. Cambridge Histories Online Cambridge University Press [sixth edition].p.383-384


103 Warring States Japan unknown Suspected Expert -
They existed in previous period, but sources do not say whether they still did at this time. Frequent warfare likely caused major disruptions, so continuity with preceding periods is more difficult to infer.
104 Japan - Azuchi-Momoyama present Confident Expert -
‘the construction by Hideyoshi of a large-scale bridge across the Kamo River.’ [1]

[1]: Kirby, John. 1962. From Castle to Teahouse: Japanese Architecture of the Momoyama Period. Tuttle Publishing.


105 Tokugawa Shogunate present Confident Expert -
[1] In a bid to maintain control and limit potential uprisings ‘the government deliberately refrained from building bridges and otherwise facilitating communications on the main lines of approach to Yedo [Edo;Tokyo]’ enabling them to monitor all access routes to and from the city. [2]

[1]: Henshall, Kenneth (2012) A History of Japan: From Stone Age to Superpower. New York: Palgrave Macmillan. [Third Edition]. p.57.

[2]: Sansom, George Bailey. 1976. Japan: A Short Cultural History. Barrie & Jenkins [Revised 2nd ed].p.448.


106 Iban - Pre-Brooke absent Confident Expert -
-
107 Iban - Brooke Raj and Colonial absent Confident Expert -
-
108 Konya Plain - Ceramic Neolithic absent Confident Expert -
-
109 Konya Plain - Late Neolithic absent Confident Expert -
-
110 Konya Plain - Early Chalcolithic absent Inferred Expert -
-
111 Konya Plain - Late Chalcolithic absent Inferred Expert -
-
112 Middle Bronze Age in Central Anatolia present Confident Expert -
[1]

[1]: Barjamovic G. 2011. A Historical Geography of Anatolia in the Old Assyrian Colony Period. Copenhagen: Museum Tusculanum Press, pg. 396


113 Hatti - Old Kingdom present Confident Expert -
The Citadel Büyükkale at Hattusa was connected to a system of stone viaducts and bridge with the Büyükkaya [1] Which period does this refer to?

[1]: Makowski M. (2009) Świat późnej epoki brązu. pp.157 [In:] A. Smogorzewska (ed.) Archeologia starożytnego Bliskiego Wschodu, Warszawa: Instytut Archeologii UW, pp. 151-187)


114 Konya Plain - Late Bronze Age II present Confident Expert -
The Citadel Büyükkale at Hattusa was connected to a system of stone viaducts and bridge with the Büyükkaya [1]

[1]: Makowski M. (2009) Świat późnej epoki brązu. pp.157 [In:] A. Smogorzewska (ed.) Archeologia starożytnego Bliskiego Wschodu, Warszawa: Instytut Archeologii UW, pp. 151-187)


115 Hatti - New Kingdom present Confident Expert -
The Citadel Büyükkale at Hattusa was connected to a system of stone viaducts and bridge with the Büyükkaya [1] Which period does this refer to?

[1]: Makowski M. (2009) Świat późnej epoki brązu. pp.157 [In:] A. Smogorzewska (ed.) Archeologia starożytnego Bliskiego Wschodu, Warszawa: Instytut Archeologii UW, pp. 151-187)


116 Neo-Hittite Kingdoms present Inferred Expert -
inherited and still maintained?
117 Phrygian Kingdom present Confident Expert -
Bridges known near the capital city [1] .

[1]: Voigt, M., R. Henrickson, 2000, “Reviewed Formation of the Phrygian State: The Early Iron Age at Gordion”, Anatolian Studies, Vol. 50, pg:49


118 Lysimachus Kingdom present Inferred Expert -
-
119 Late Cappadocia present Confident Expert -
Pompeius organisation: “The ineffectual Ariobarzanes was restored yet again to the throne of Cappadocia. He retained the Tomisa bridgehead between Melitene and Sophene on the far bank of the Euphrates, given to him by Lucullus, which controlled the route across the Taurus to southern Armenia…” [1]

[1]: Sherwin-White, A. N. (1984) Roman Foreign Policy in the Near East, 168 BC to AD 1. London: Duckworth. p226


120 Rum Sultanate present Confident Expert -
Bridges "are best regarded as public works" and initially financed by the State.
121 Ilkhanate present Confident Expert -
It is not stated in the sources that the Ilkhans destroyed all the bridges in Persia and this would be unlikely due to the importance of bridges to trade. Ghazan tried to improve security on the roads [1] and may have built or maintained bridges.

[1]: (Morgan 2015, 75) Morgan, David. 2015. Medieval Persia 1040-1797. Routledge.


122 Ottoman Emirate present Confident Expert -
Repaired to facilitate movement of army. [1]

[1]: (Nicolle 1983, 6)


123 Ottoman Empire I present Confident Expert -
Bridge building. [1]

[1]: (Lapidus 2012, 449)


124 Ottoman Empire II present Confident Expert -
Bridge building. [1]

[1]: (Lapidus 2012, 449)


125 Ottoman Empire III present Confident Expert -
Bridge building. [1]

[1]: (Lapidus 2012, 449)


126 Latium - Copper Age absent Confident Expert -
The first bridge thought to be the Pons Sublicius possibly in built 642 BCE under Ancus Marcius.
127 Latium - Bronze Age absent Confident Expert -
The first bridge thought to be the Pons Sublicius possibly in built 642 BCE under Ancus Marcius.
128 Latium - Iron Age absent Inferred Expert -
The first bridge thought to be the Pons Sublicius possibly in built 642 BCE under Ancus Marcius.
129 Roman Kingdom present Confident Expert -
The first bridge thought to be the Pons Sublicius possibly in built 642 BCE under Ancus Marcius.
130 Early Roman Republic present Confident Expert -
The first bridge thought to be the Pons Sublicius possibly in built 642 BCE under Ancus Marcius.
131 Middle Roman Republic present Confident Expert -
The first bridge thought to be the Pons Sublicius possibly in built 642 BCE under Ancus Marcius. In 179 BCE the first stone bridge was constructed. [1] Ponte San Lorenzo at Bulicame, Ponte di Nona in Rome, both 174 BCE. Pons Aemilius 142 BCE. Ponte dell’Abadia near Vulci 90 BCE. "The maximum span of Roman bridges increased from 80 feet (24 meters) in 142 BCE to 115 feet (35 meters) by Augustus’ reign (27 BC - 14 CE) and was not exceeded until about 605 CE, by the span of 120 feet (37 meters) of the bridge at Zhao-Zhou in China." [2]

[1]: (Stearns 2001)

[2]: (Gagarin and Fantham 2009, 25)


132 Late Roman Republic present Confident Expert -
The first bridge thought to be the Pons Sublicius possibly in built 642 BCE under Ancus Marcius. In 179 BCE the first stone bridge was constructed. [1] Caesar’s engineers bridged the Rhine with a wooden bridge in 10 days. The Pons Fabricius arch bridge was constructed in 62 BCE.

[1]: (Stearns 2001)


133 Western Roman Empire - Late Antiquity present Confident Expert -
-
134 Ostrogothic Kingdom present Inferred Expert -
"The daily operation of the government, the maintenance of the post, road repair, and the like, primarily remained the..." - cannot read more than this, suggests these practices continued in the Ostrogothic Kingdom, presumably operated by Romans. [1]

[1]: (Burns 1991, 74)


135 Exarchate of Ravenna present Confident Expert -
-
136 Republic of St Peter I present Confident Expert -
Papal revenue was spent on maintenance. [1]

[1]: (Woods 1921, 47)


137 Rome - Republic of St Peter II present Confident Expert -
The popes maintained bridges across the Tiber; in other cities, such as Ravenna, the local bishops or secular officials did the same.
138 Papal States - High Medieval Period present Confident Expert -
The popes maintained bridges across the Tiber; in other cities, such as Ravenna, the local bishops or secular officials did the same.
139 Papal States - Renaissance Period present Confident Expert -
The papacy was responsible, through the Roman city government, for maintaining the bridges over the Tiber.
140 Papal States - Early Modern Period I present Confident Expert -
-
141 Papal States - Early Modern Period II present Confident Expert -
-
142 Sakha - Early absent Confident Expert -
Built-up transport infrastructure was introduced in the early Russian period (see next sheet).
143 Sakha - Late absent Confident Expert -
The Sakha relied on recently introduced boats and rafts rather than bridges: ’Besides these above mentioned indirect proofs, direct traditions have been preserved among the Yakut which testify to the fact that the Yakut became acquainted with boats, nets, and fishing in general only comparatively recently.’ [1] ’Last of all, the Yakut do not have a single name of their own for fishing boats and vessels. Rafts are given the Russian name puluot, or bulot; in general they call boats by the Tungus name ogongcho. Karbas sewn out of boards are called, as in Russian, karbas. They fr ankly ackn owledge that the birch-bark boat is of Tungus origin, calling it tongus or omuk ogongcho. The round-bottomed Russian barge, the dug-out, is called ustrus, while the flat-bottomed vetka is given the most varied names, depending on the locality; in the neighborhood of Olekminsk, in the Yakutsk Okrug, and on the Aldan the Yakut have the same name for it as the Buryat - bat, or they give it the Russian name - betky; on the Boganida it is called toy, on the Vilyuy, Kolyma, and Yana, it is sometimes called tyy, sometimes ty. The Yenisey Ostyak use just this same word ti (ti) with a drawn out i on the end for a boat of medium size, which has the same relation as the Yakut ty on the one side to the birch-bark boat, and on the other side to the karbas (see fig. 34).’ [2]

[1]: Sieroszewski, Wacław 1993. “Yakut: An Experiment In Ethnographic Research”, 528

[2]: Sieroszewski, Wacław 1993. “Yakut: An Experiment In Ethnographic Research”, 525


144 Shuar - Colonial present Confident Expert -
According to SCCS variable 14 ’Routes of Land Transport’ only ‘1’ or ’unimproved trails’ were used for land transport, not roads. Rivers were negotiated by canoe or raft: ’The most important means of transportation along the upper Marañón and its tributaries is the canoe (Fig. 8). One could even say that this dug-out is the only means of transportation since there are only a few isolated overland paths.’ [1] ’The canoe appears in several sizes. Some accomodate only one to two people, others up to twenty men. All of them are made of cedar wood. Whether small or large, they all have the same shape. The part that touches the water is round in cross-section just as the original tree. At both ends flat seats for the oarsman were provided when the canoe was dug out. The canoe is directed by means of paddles, but on upstream voyages long bamboo poles (tanganas) are required, and with their help the boat is pushed forward. Should the river bank be flat, some Indians may jump into the water to pull the canoe with the help of lianas.’ [1] ’Another means of transportation in the river area is the raft (balsa). It can be used for downstream voyages only and is therefore not so frequent. It is made by uniting several balsa trunks. The rafts are kept within the current by means of paddles.’ [1] The Shuar crossed even broad rivers swimming: ’“The Jibaros, when they are about to cross a broad river swimming, are in the habit of swallowing a fish-sound before they enter the water. In this way, they believe, they will be able to float on the water and swim as easily as a fish.’ [2] Reiss also reports liana bridges: ’The six or seven houses which make up the village of Paira (1,617 meters) lie two short days of travel farther down in the valley. The foot of the steep mountains has been reached here; only elongated hills continue to the east. The rivers, still rapid, to be sure, become broad and even navigable for short stretches; an immense forest area stretches out before one’s eyes. Up to here we found the brooks, which were difficult to cross, bridged over, although the liana bridges, serving as a model for our suspension bridges, sometimes offered crossings which appeared dangerous. Farther down, however, the rivers had to be waded, for the Jesuits, in order to make access to their mission more difficult, had pulled down the bridges formerly present and had taken the canoes used for ferrying into Mácas into their own custody.’ [3]

[1]: Brüning, Hans H. 1928. “Travelling In The Aguaruna Region”, 74

[2]: Karsten, Rafael 1935. “Head-Hunters Of Western Amazonas: The Life And Culture Of The Jibaro Indians Of Eastern Ecuador And Peru”, 453p

[3]: Reiss, W. (Wilhelm) 1880. “Visit Among The Jivaro Indians", 6


145 Shuar - Ecuadorian present Confident Expert -
According to SCCS variable 14 ’Routes of Land Transport’ only ‘1’ or ’unimproved trails’ were used for land transport, not roads. Rivers were negotiated by canoe or raft: ’The most important means of transportation along the upper Marañón and its tributaries is the canoe (Fig. 8). One could even say that this dug-out is the only means of transportation since there are only a few isolated overland paths.’ [1] ’The canoe appears in several sizes. Some accomodate only one to two people, others up to twenty men. All of them are made of cedar wood. Whether small or large, they all have the same shape. The part that touches the water is round in cross-section just as the original tree. At both ends flat seats for the oarsman were provided when the canoe was dug out. The canoe is directed by means of paddles, but on upstream voyages long bamboo poles (tanganas) are required, and with their help the boat is pushed forward. Should the river bank be flat, some Indians may jump into the water to pull the canoe with the help of lianas.’ [1] ’Another means of transportation in the river area is the raft (balsa). It can be used for downstream voyages only and is therefore not so frequent. It is made by uniting several balsa trunks. The rafts are kept within the current by means of paddles.’ [1] The Shuar crossed even broad rivers swimming: ’“The Jibaros, when they are about to cross a broad river swimming, are in the habit of swallowing a fish-sound before they enter the water. In this way, they believe, they will be able to float on the water and swim as easily as a fish.’ [2] Reiss also reports liana bridges: ’The six or seven houses which make up the village of Paira (1,617 meters) lie two short days of travel farther down in the valley. The foot of the steep mountains has been reached here; only elongated hills continue to the east. The rivers, still rapid, to be sure, become broad and even navigable for short stretches; an immense forest area stretches out before one’s eyes. Up to here we found the brooks, which were difficult to cross, bridged over, although the liana bridges, serving as a model for our suspension bridges, sometimes offered crossings which appeared dangerous. Farther down, however, the rivers had to be waded, for the Jesuits, in order to make access to their mission more difficult, had pulled down the bridges formerly present and had taken the canoes used for ferrying into Mácas into their own custody.’ [3]

[1]: Brüning, Hans H. 1928. “Travelling In The Aguaruna Region”, 74

[2]: Karsten, Rafael 1935. “Head-Hunters Of Western Amazonas: The Life And Culture Of The Jibaro Indians Of Eastern Ecuador And Peru”, 453p

[3]: Reiss, W. (Wilhelm) 1880. “Visit Among The Jivaro Indians", 6


146 Egypt - New Kingdom Thutmosid Period present Confident Expert -
Bridges over wide expanse of water unknown. Small bridges were built. A bridge at Amarna linked two parts of a royal palace that was separated by a Royal Road. It was supported by two pillars 5 meters apart. [1]

[1]: (Arnold 2003, 37)


147 Egypt - New Kingdom Ramesside Period present Confident Expert -
Bridges over wide expanse of water unknown. Small bridges were built. A bridge at Amarna linked two parts of a royal palace that was separated by a Royal Road. It was supported by two pillars 5 meters apart. [1]

[1]: (Arnold 2003, 37)


148 Egypt - Thebes-Libyan Period present Inferred Expert -
Present in Ramesside period.
149 Egypt - Saite Period present Inferred Expert -
small bridges known in ancient times. likely had small wooden bridges if no large or stone bridges.
150 Egypt - Inter-Occupation Period present Inferred Expert -
-
151 Numidia unknown Suspected -
-
152 Ptolemaic Kingdom II present Inferred Expert -
-
153 Mauretania unknown Suspected -
-
154 Middle Wagadu Empire unknown Suspected Expert -
-
155 Fatimid Caliphate present Confident Expert -
Great Bridge. [1]

[1]: (Raymond 2000, 48)


156 Later Wagadu Empire unknown Suspected Expert -
-
157 Banu Ghaniya unknown Suspected -
-
158 Zagwe unknown Suspected -
-
159 Mali Empire unknown Suspected Expert -
-
160 Egypt - Mamluk Sultanate I present Confident Expert -
Bridge over Abu’l Managga irrigation canal. [1] "In a traditional society that lacked the concept of public or municipal agencies, as individuals, the members of this ruling class assumed responsibility for what we would consider public concerns. The mamluks were patrons of art, schools, and mosques; builders of roads, bridges, and markets; and overseers of "public works," morality, and charity." [2] Seven bridges constructed over al-Nasiri canal between 1325 and 1376 CE. [3]

[1]: (Nicolle 2014) Nicolle, D. 2014 Mamluk Askar 1250-1517. Osprey Publishing Ltd.

[2]: (Dols 1977, 152)

[3]: (Raymond 2000, 125)


161 Malacca Sultanate unknown Suspected -
-
162 Egypt - Mamluk Sultanate II present Confident Expert -
Seven bridges constructed over al-Nasiri canal between 1325 and 1376 CE. [1] "In a traditional society that lacked the concept of public or municipal agencies, as individuals, the members of this ruling class assumed responsibility for what we would consider public concerns. The mamluks were patrons of art, schools, and mosques; builders of roads, bridges, and markets; and overseers of "public works," morality, and charity." [2]

[1]: (Raymond 2000, 125)

[2]: (Dols 1977, 152)


163 Songhai Empire unknown Confident -
-
164 Egypt - Mamluk Sultanate III present Confident Expert -
Bridges "maintained right up until the end of Mamluk rule". [1] Bridge over Abu’l Managga irrigation canal. [2] "In a traditional society that lacked the concept of public or municipal agencies, as individuals, the members of this ruling class assumed responsibility for what we would consider public concerns. The mamluks were patrons of art, schools, and mosques; builders of roads, bridges, and markets; and overseers of "public works," morality, and charity." [3]

[1]: (Oliver and Atmore 2001, 21) Oliver R and Atmore A. 2001. Medieval Africa 1250-1800. Cambridge University Press. Cambridge.

[2]: (Nicolle 2014) Nicolle, D. 2014 Mamluk Askar 1250-1517. Osprey Publishing Ltd.

[3]: (Dols 1977, 152)


165 Kingdom of Congo unknown Suspected -
-
166 Songhai Empire - Askiya Dynasty unknown Suspected Expert -
-
167 Late Shang present Inferred Expert -
"As early as the Shang period, roads were controlled by a special official" [1] Must have been at least some small wooden or stone bridges over rivers and streams.

[1]: (Lindqvist 2009) Lindqvist, Cecilia. 2009. China: Empire of Living Symbols. Da Capo Press.


168 Western Zhou present Inferred Expert -
"As early as the Shang period, roads were controlled by a special official, and in the Zhou period, traffic had reached such proportions that regulations were introduced for particularly crowded crossroads and reckless driving was prohibited." [1] Must have been stone or wooden bridges over rivers and streams.

[1]: (Lindqvist 2009) Lindqvist, Cecilia. 2009. China: Empire of Living Symbols. Da Capo Press.


169 Jin present Inferred Expert -
"As early as the Shang period, roads were controlled by a special official, and in the Zhou period, traffic had reached such proportions that regulations were introduced for particularly crowded crossroads and reckless driving was prohibited." [1] Must have been stone or wooden bridges over rivers and streams.

[1]: (Lindqvist 2009) Lindqvist, Cecilia. 2009. China: Empire of Living Symbols. Da Capo Press.


170 Chu Kingdom - Spring and Autumn Period present Inferred -
-
171 Qin Empire present Confident -
-
172 Western Han Empire present Confident Expert -
[1]

[1]: (Keay 2009, 146)


173 Eastern Han Empire present Confident Expert -
Commandery governers had bureaus that dealt with bridges. [1]

[1]: (Bielenstein 1986, 508)


174 Western Jin present Inferred Expert -
-
175 Northern Wei present Confident Expert -
Constructed by Monasteries [1]

[1]: (Bol, Peter. North China Workshop 2016)


176 Sui Dynasty present Confident Expert -
Army engineers constructed pontoon bridges to cross the Liao River in 612 CE. [1]

[1]: (Xiong 2006, 56)


177 Tang Dynasty I present Inferred Expert -
-
178 Nara Kingdom present Confident Expert -
[1]

[1]: Brown, Delmer M. 1993. The Cambridge History of Japan Volume 1: Ancient Japan. Cambridge Histories Online © Cambridge University Press.p.250


179 Tang Dynasty II present Confident Expert -
-
180 Jin Dynasty present Confident Expert -
e.g. Marco Polo Bridge
181 Mongol Empire present Confident Expert -
"To prepare for his arrival, Mas’fid-beg, Arqan-aqa, and other Mongol officials situated along Hule’u’s line of march were instructed to prepare. They repaired roads, bridged rivers, and established ferries where there were no bridges. They also had to find and reserve pasturage of the flocks following Hule’u’s army." [1]

[1]: (Buell 2003, 51)


182 Great Yuan present Confident Expert -
-
183 Great Ming present Confident Expert -
e.g. five bridges of the Meridian Gate across the Golden Water River [1]

[1]: (Tsai 1996, p.35)


184 Third Scythian Kingdom unknown Suspected -
-
185 Xiongnu Imperial Confederation unknown Suspected Expert -
-
186 Kangju unknown Suspected -
-
187 Late Xiongnu unknown Suspected Expert -
-
188 Rouran Khaganate unknown Suspected Expert -
c500 CE and after: "It may be assumed that by then some of the Juan-juan already lived a settled life and practised agriculture. The original sources repeatedly mention that their khagans obtained ‘seed millet’ from China (some 10,000 shi each time). This shows that the Juan-juan society and state had gradually developed from nomadic herding to a settled agricultural way of life, from yurts to the building of houses and monumental architecture, from the nomadic district to towns. They had invented their own system of writing and developed their own local culture and Buddhist learning flourished." [1]

[1]: (Kyzlasov 1996, 317)


189 Yueban unknown Suspected -
-
190 Kidarite Kingdom present Inferred Expert -
Across the waterways in Bactria.
191 Western Turk Khaganate present Inferred Expert -
"The Türk state aspired to make the roads safe and gave its backing to the Sogdian diplomats’ trade negotiations." [1]

[1]: (Marshak 1996, 242)


192 Eastern Turk Khaganate unknown Suspected Expert -
-
193 Avar Khaganate unknown Suspected -
-
194 Uigur Khaganate unknown Suspected Expert -
-
195 Samanid Empire present Confident Expert -
Samanid bridge over the Shahrud. [1]

[1]: (Gangler, Gaube, Petruccioli 2004, 104) Gangler, Anette. Gaube, Heinz. Petruccioli, Attilio. 2004. Bukhara, the Eastern Dome of Islam: Urban Development, Urban Space, Architecture and Population. Edition Axel Menges.


196 Khitan I present Confident Expert -
"In Sheng-tsung’s early years (984-9) serious attention was given to building roads and bridges to provide easier passage for carts and to improving the courier system, which was essential to the rapid transmission of orders and information. In 1027 a strip of land thirty double paces wide on either side of official highways was ordered to be kept cleared for security purposes." [1]

[1]: (Twitchett, D.C. and K. Tietze. 1994. The Liao. In Franke, H. and D.C. Twitchett (eds) The Cambridge History of China Volume 6: Alien Regimes and Border States, 907-1368 pp. 43-153. Cambridge: Cambridge University Press. P. 95)


197 Kara-Khanids present Confident Expert -
"In the course of the eleventh and twelfth centuries, baked brick came to be used more widely, especially in major construction projects such as palaces, mosques, madrasas, mausoleums and bridges." [1]

[1]: (Davidovich 1997, 149) Davidovich, E A. in Asimov, M S and Bosworth, C E eds. 1997. History of Civilizations of Central Asia. Volume IV. Part I. UNESCO.


198 Kingdom of Georgia II present Confident -
-
199 Xixia present Confident -
-
200 Russian Principate present Confident -
-
201 Khwarezmid Empire present Confident -
There were bridges throughout the region. [1]

[1]: Buniyatov 2015: 53, 116, 127, 138. https://www.zotero.org/groups/1051264/seshat_databank/items/SAEVEJFH


202 Chagatai Khanate present Inferred Expert -
Present in Mongolian Empire.
203 Kazan Khanate present Inferred -
-
204 Tudor and Early Stuart England present Confident -
Bridges were vital form of routes around the polity. Cities especially, such as London, York and Newcastle would have multiple bridges across their rivers. [1] “This made London an intersection between traffic north–south and east–west. London Bridge (see plate 11) had linked the north and south banks of the Thames since the twelfth century. In fact, London mostly developed on its northern bank; to the south was the suburb of Southwark. Here, on the fringe of the city’s jurisdiction, flourished theaters such as the Rose and the Globe, bear-gardens (for bear- and bull-baiting), brothels, and taverns. In short, if you wanted an exciting – or a dangerous – time in London, you headed across the bridge.” [2]

[1]: (Bucholz et al 2013: 362) Bucholz, Robert, Newton Key, and R.O. Bucholz. 2013. Early Modern England 1485-1714: A Narrative History. Chichester, UK: John Wiley & Sons. http://ebookcentral.proquest.com/lib/uvic/detail.action?docID=1166775. https://www.zotero.org/groups/1051264/seshat_databank/items/XQGJH96U

[2]: (Bucholz et al 2013: 196) Bucholz, Robert, Newton Key, and R.O. Bucholz. 2013. Early Modern England 1485-1714: A Narrative History. Chichester, UK: John Wiley & Sons. http://ebookcentral.proquest.com/lib/uvic/detail.action?docID=1166775. https://www.zotero.org/groups/1051264/seshat_databank/items/XQGJH96U


205 Early Merovingian present Confident Expert -
Roman era bridges. Gregory of Tours mentions the Grand pont over the Seine at Paris. [1]

[1]: (Yates and Gibson 1994, 13) Yates, N and Gibson, J M. 1994. Traffic and Politics: The Construction and Management of Rochester Bridge, AD 43-1993. Boydell & Brewer. Rochester.


206 Lombard Kingdom present Confident -
-
207 Middle Merovingian present Confident Expert -
Roman era bridges. Gregory of Tours mentions the Grand pont over the Seine at Paris. [1]

[1]: (Yates and Gibson 1994, 13) Yates, N and Gibson, J M. 1994. Traffic and Politics: The Construction and Management of Rochester Bridge, AD 43-1993. Boydell & Brewer. Rochester.


208 Duchy of Aquitaine I present Confident -
-
209 Carolingian Empire I unknown Suspected Expert -
-
210 Carolingian Empire II present Confident Expert -
Bridge building beginning in the 11th century. [1] There were existing bridges that could be maintained, e.g. in Paris.

[1]: (Boyer 1995, 1748-1751)


211 Novgorod Land present Confident -
-
212 Kievan Rus present Inferred -
-
213 Kingdom of Sicily - Hohenstaufen and Angevin dynasties present Confident -
-
214 French Kingdom - Early Valois present Confident Expert -
Bridge built over Saone at St-Jean-de-Losne. [1] Bridge of St. Laurent at Macon. [2]

[1]: (Spufford 2006, 155)

[2]: (Spufford 2006, 164)


215 Grand Principality of Moscow, Rurikid Dynasty present Confident -
-
216 Kassite Babylonia present Inferred Expert -
"Routes were often dictated by the location of oases, mountain passes, and river crossings, by bridge, ford, or ferry."EXTERNAL_INLINE_REFERENCE: ;(McIntosh 2005: 139) McIntosh, J. 2005. Ancient Mesopotamia: New Perspective. Santa Barbara: ABC Clio. Seshat URL: EXTERNAL_INLINE_LINK: https://www.zotero.org/groups/1051264/seshat_databank/items/itemKey/KK2E3KMD .;
217 Neo-Babylonian Empire present Confident Expert -
The city of Babylon straddled the Euphrates river and a bridge was maintained to join the two parts of the city [1]

[1]: Gill, A. 2008. Gateway of the Gods: Rise and Fall of Babylon. London: Quercus. p.104


218 Greco-Bactrian Kingdom unknown Suspected Expert -
-
219 Himyar I unknown Suspected Expert -
-
220 Himyar II unknown Suspected Expert -
-
221 Saffarid Caliphate present Confident -
Bridges were found throughout the region and were maintained and expanded over the polity period. [1]

[1]: Frye 2007: 128. https://www.zotero.org/groups/1051264/seshat_databank/items/7XE9P8HB


222 Egypt - Tulunid-Ikhshidid Period present Confident Expert -
-
223 Buyid Confederation present Confident Expert -
Abud al-Daula restored the bridge over the Hinduwān at Ahvaz. [1] The Amir Barrier in Fars had three purposes: join river banks (bridge), water supply for irrigation, and energy (to turn water wheels for a millstone). [2]

[1]: Busse, H. 1975. Iran under the Būyids. In Frye, R. N. (ed.) The Cambridge History of Iran. Volume 4. The period from the Arab Invasion to the Saljuq’s. Cambridge: Cambridge University Press. p.284

[2]: (Mahmoudian and Mahmoudian 2012, 95) Angelakis A N, Mays L W, Koutsoyiannis, D. 2012. Evolution of Water Supply Through the Millennia. IWA Publishing.


224 Seljuk Sultanate present Confident Expert -
Malan bridge near Herat. [1] Pul-e Malan, near Herat, is a 22-arched bridge constructed by Seljuks 12th CE. [2] "Nizam al-Mulk was particularly concerned with the construction and maintenance of trade routes, caravanserais, and bridges". [3]

[1]: (Starr 2013) Starr, S. Frederick. 2013. Lost Enlightenment: Central Asia’s Golden Age from the Arab Conquest to Tamerlane. Princeton University Press. Princeton.

[2]: https://www.lonelyplanet.com/afghanistan/herat/attractions/pul-e-malan/a/poi-sig/451141/355747

[3]: (Lindsay 2005, 20) Lindsay, James E. 2005. Daily Life in The Medieval Islamic World. Hackett Publishing Company, Inc. Indianapolis.


225 Ayyubid Sultanate present Confident Expert -
Communications with al-Maqs were improved by the building of roads in 1177 and the Muski Bridge over the Khalij prior to 1188 CE. [1] A bridge was built between the Rawdah Island and Fustat around 1240 CE. [2] "Saladin put a great deal of investment into roads, bridges and fortified khans." [3]

[1]: (Raymond 2001, 97)

[2]: (Raymond 2001, 101)

[3]: (Nicolle 2011) Nicolle, D. 2011. Saladin. Osprey Publishing.


226 Rasulid Dynasty present Confident Expert -
There was a Rasulid bridge at Damt. [1]

[1]: (Lamprakos 2016) Michele Lamprakos. 2016. Building a World Heritage City: Sanaa, Yemen. Routledge.


227 Timurid Empire present Confident Expert -
Ulugh Beg built a bridge across the Oxus. [1]

[1]: (Manz 2007, 263) Manz, Beatrice Forbes. 2007. Power, Politics and Religion in Timurid Iran. Cambridge University Press. Cambridge.


228 Yemen - Tahirid Dynasty present Inferred Expert -
This is based on the codes for the Rasulids as ’Sultan ’Amir also appears to have been emulating the high period of Rasulid power a hundred years earlier’ [1] . There was a Rasulid bridge at Damt. [2]

[1]: Porter, Venetia Ann (1992) The history and monuments of the Tahirid dynasty of the Yemen 858-923/1454-1517, Durham theses, Durham University, p. 4 Available at Durham E-Theses Online: http://etheses.dur.ac.uk/5867/

[2]: (Lamprakos 2016) Michele Lamprakos. 2016. Building a World Heritage City: Sanaa, Yemen. Routledge.


229 Safavid Empire present Confident Expert -
e.g. Khaju Bridge built by Shah ʿAbbās II over the Zayanderud at Isfahan [1]

[1]: Rudi Matthee ‘SAFAVID DYNASTY’http://www.iranicaonline.org/articles/safavids


230 Bagan present Confident -
-
231 Bengal Sultanate present Confident -
-
232 Sharqi present Confident -
-
233 Yangshao unknown Suspected Expert -
Unknown. Wooden bridges?
234 Northern Song present Confident Expert -
"Most of the prefectural armies did not receive military training; they were merely involved in wall and road repair, river dike building, bridge construction, transportation, and other types of hard labor." [1]

[1]: (Tseng-yü and Wright 2009, 218)


235 Southern Song present Confident -
-
236 Jenne-jeno I unknown Suspected Expert -
-
237 Jenne-jeno II unknown Suspected Expert -
-
238 Jenne-jeno III unknown Suspected Expert -
-
239 Jenne-jeno IV unknown Suspected Expert -
-
240 Saadi Sultanate unknown Suspected Expert -
-
241 Neguanje present Inferred Expert 800 CE 1050 CE
Some of the infrastructure seen in Pueblito/Ciudad Perdida appears from 800 CE onwards. [1]

[1]: (Giraldo 2015, personal communication)


242 Tairona present Confident Expert -
"To facilitate the redistribution of products the different regional chiefdoms of the northeast SNSM built an extensive network of paths, bridges, and paved stairs." [1] SNSM is Sierra Nevada de Santa Marta.

[1]: (Oyuela-Caycedo 2008, 423)


243 Early Xiongnu absent Inferred Expert -
Not enough data, though it seems to reasonable infer absence.
244 Xianbei Confederation unknown Suspected Expert -
-
245 Second Turk Khaganate unknown Suspected Expert -
-
246 Early Mongols absent Confident Expert -
-
247 Zungharian Empire unknown Suspected Expert -
-
248 Orokaiva - Pre-Colonial present Confident Expert -
According to SCCS variable 14 ’Routes of Land Transport’ only ‘1’ or ’unimproved trails’ were used for land transport, not roads. The Orokaiva constructed wooden bridges or gangways: ’Bridges. Formerly, I am told, stretches of swamp were spanned by single logs supported on cross-trestles. The modern type of this bridge has an adzed surface to make walking safer, and is certainly preferable to the other style (viz. a raised gangway with clumsily laid cross-pieces) until, as is so often the case, the log is found to be slippery and aslant. Small creeks are crossed by single tree-trunks, over which the native, a fearless balancer, walks without misgiving, despite the queer and disconcerting vibrations set up by his footsteps on a long log.’ [1]

[1]: Williams, F. E. (Francis Edgar), and Hubert Murray 1930. “Orokaiva Society”, 72


249 Orokaiva - Colonial present Confident Expert -
According to SCCS variable 14 ’Routes of Land Transport’ only ‘1’ or ’unimproved trails’ were used for land transport, not roads. The Orokaiva constructed wooden bridges or gangways: ’Bridges. Formerly, I am told, stretches of swamp were spanned by single logs supported on cross-trestles. The modern type of this bridge has an adzed surface to make walking safer, and is certainly preferable to the other style (viz. a raised gangway with clumsily laid cross-pieces) until, as is so often the case, the log is found to be slippery and aslant. Small creeks are crossed by single tree-trunks, over which the native, a fearless balancer, walks without misgiving, despite the queer and disconcerting vibrations set up by his footsteps on a long log.’ [1] By the time of the Mt. Lamington eruption, the colonial authorities had built bridges for its own infrastructural needs: ’When the volcano erupted on 21 January 1951, Koropatans noticed the dark smoke and cloud and saw ash and stones carried through the air. The survivors including the sick moved to Wairope on the Kumusi bridge. A married couple from Koropata, Stephenson Kareka and Flora Amaupa, evoked the scene: ‘There was no water and no food as both had been spoiled by the lava and ash. The government supplied food. They flew in rice and fish. The people stayed at Wairope for three months. After that time, Bishop David Hand sent the people back to the villages as the volcano had finished …’’ [2] [Even in colonial settlements, services were of a makeshift character.]

[1]: Williams, F. E. (Francis Edgar), and Hubert Murray 1930. “Orokaiva Society”, 72

[2]: Newton, Janice 1985. “Orokaiva Production And Change”, 59


250 Beaker Culture unknown Suspected Expert -
-
251 Atlantic Complex unknown Suspected Expert -
No information found in sources so far.
252 Hallstatt A-B1 unknown Suspected Expert -
-
253 Hallstatt C unknown Suspected Expert -
-
254 Hallstatt D unknown Suspected Expert -
-
255 La Tene A-B1 unknown Suspected Expert -
-
256 La Tene B2-C1 present Confident Expert -
Lake Neuchatel trade-related bridge found, carbon-dated 251 BCE [1] Another bridge at found at Cornaux. [1]

[1]: (Kruta 2004, 25)


257 La Tene C2-D present Confident Expert -
Lake Neuchatel trade-related bridge found, carbon-dated 251 BCE [1] Another bridge at found at Cornaux. [1]

[1]: (Kruta 2004, 25)


258 Proto-Carolingian present Confident Expert -
Roman era bridges. Gregory of Tours mentions the Grand pont over the Seine at Paris. [1]

[1]: (Yates and Gibson 1994, 13) Yates, N and Gibson, J M. 1994. Traffic and Politics: The Construction and Management of Rochester Bridge, AD 43-1993. Boydell & Brewer. Rochester.


259 Proto-French Kingdom present Confident Expert -
Beginning in the 11th century. [1] Polity funded/owned?

[1]: (Boyer 1995, 1748-1751)


260 French Kingdom - Late Capetian present Confident Expert -
Bridge built over Saone at St-Jean-de-Losne. [1] Bridge of St. Laurent at Macon. [2] Bridge at Avignon 1177 CE over Rhone funded by alms givers. [3]

[1]: (Spufford 2006, 155)

[2]: (Spufford 2006, 164)

[3]: (Spufford 2006, 169)


261 French Kingdom - Late Valois present Inferred Expert -
Early Valois bridges built over Saone at St-Jean-de-Losne. [1] and bridge of St. Laurent at Macon. [2]

[1]: (Spufford 2006, 155)

[2]: (Spufford 2006, 164)


262 French Kingdom - Early Bourbon unknown Suspected Expert -
-
263 French Kingdom - Late Bourbon present Confident Expert -
[1]

[1]: (Ladurie 1991, 153, 306)


264 Sarazm unknown Suspected Expert -
-
265 Andronovo unknown Suspected Expert -
-
266 Koktepe I unknown Suspected Expert -
-
267 Tocharians unknown Suspected Expert -
Possibly bridges over the Zarastran but unsure.
268 Sogdiana - City-States Period present Confident Expert -
"It was in the name of the com- munity that the town could rent out certain properties, such as the bridge at Panjikent, the toll of which was entrusted to two persons, on condition that they pay 150 silver drachms in advance for the annual receipts." [1]

[1]: (De la Vaissière 2005, 168)


269 Khanate of Bukhara present Confident Expert -
"Trade was carried on for the most part along heavily travelled land routes, but also along waterways, especially the Amu Darya. For instance, ‘from the Kelif quayside at Termez, where the corn grows well and ripens early’, boats left laden with corn for Khwarazm. As the Bukhara khanate split up into semi- independent principalities, trade was hindered by numerous toll stations on roads, bridges and ferries." [1]

[1]: (Mukminova 2003, 53)


270 Hmong - Late Qing present Inferred Expert -
-
271 Hmong - Early Chinese present Confident Expert -
Chinese anthropologists report a variety of bridges in the area: ’Bridges. - The bridge in the Miao area involve considerable construction work. On important communication roads, they generally built three or five-arch bridges (Illus. 11) on which were built houses for hotels and restaurants for the convenience of travelers. Places where a river is wide and shallow are spanned by long bridges (Illus. 22, 23). Places where a river is wide and deep are crossed by rope bridges (Illus. 24). In small streams which are narrow and have sandbanks they sat up stone steps, customarily called ho shui ch’iao /“bridge enclosing the water”/ (Illus. 25), or they build small bridges (Illus. 26) over them.’ [1] Some mission stations devised bridge construction schemes: ’The mountain community of Shimenkan (Stone Gateway) in northwestern Guizhou served as the headquarters of church activity. In addition to its own large primary school, it offered secondary schooling and teacher training. At least thirty Hua Miao continued on and graduated from university in the decades before 1949. Some of these became ordained Methodist ministers or doctors and one became a well-regarded anthropologist (Yang Hanxian). Generally the local chapels were served by lay preachers who were trained at Shimenkan. Other young people received training as nurses and agricultural extension workers. At various points in time, agricultural and industrial extension programs were held at Shimenkan. New strains of potatoes were introduced, fruit orchards were planted on the hillsides of many villages, vegetable gardens were encouraged, and a number of Miao learned the techniques of carpentry, brickmaking, and masonry. More efficient looms were designed for home production of cloth. During the prerevolutionary decades, some villages benefited from collective endeavors to build bridges and roads, and pipe systems that brought water into the community. Teams of medical workers, from Shimenkan or from the churchaffiliated hospitals in nearby Zhaotong City, traveled around the area periodically. Even those who were not interested in becoming church members participated in the economic innovations, accepted treatment from the medical workers, and sent their children to the schools.’ [2]

[1]: Ling, Shun-sheng, Yifu Ruey, and Lien-en Tsao 1947. “Report On An Investigation Of The Miao Of Western Hunan”, 71

[2]: Diamond, Norma 1993. “Ethnicity And The State: The Hua Miao Of Southwest China”, 68


272 Ubaid unknown Suspected Expert -
-
273 Uruk unknown Suspected Expert -
-
274 Ur - Dynasty III unknown Suspected Expert -
-
275 Isin-Larsa present Inferred Expert -
"Routes were often dictated by the location of oases, mountain passes, and river crossings, by bridge, ford, or ferry."EXTERNAL_INLINE_REFERENCE: ;(McIntosh 2005: 139) McIntosh, J. 2005. Ancient Mesopotamia: New Perspective. Santa Barbara: ABC Clio. Seshat URL: EXTERNAL_INLINE_LINK: https://www.zotero.org/groups/1051264/seshat_databank/items/itemKey/KK2E3KMD .;
276 Second Dynasty of Isin present Inferred Expert -
"Routes were often dictated by the location of oases, mountain passes, and river crossings, by bridge, ford, or ferry."EXTERNAL_INLINE_REFERENCE: ;(McIntosh 2005: 139) McIntosh, J. 2005. Ancient Mesopotamia: New Perspective. Santa Barbara: ABC Clio. Seshat URL: EXTERNAL_INLINE_LINK: https://www.zotero.org/groups/1051264/seshat_databank/items/itemKey/KK2E3KMD .;
277 Bazi Dynasty present Inferred Expert -
"Routes were often dictated by the location of oases, mountain passes, and river crossings, by bridge, ford, or ferry."EXTERNAL_INLINE_REFERENCE: ;(McIntosh 2005: 139) McIntosh, J. 2005. Ancient Mesopotamia: New Perspective. Santa Barbara: ABC Clio. Seshat URL: EXTERNAL_INLINE_LINK: https://www.zotero.org/groups/1051264/seshat_databank/items/itemKey/KK2E3KMD .;
278 Dynasty of E present Inferred Expert -
"Routes were often dictated by the location of oases, mountain passes, and river crossings, by bridge, ford, or ferry."EXTERNAL_INLINE_REFERENCE: ;(McIntosh 2005: 139) McIntosh, J. 2005. Ancient Mesopotamia: New Perspective. Santa Barbara: ABC Clio. Seshat URL: EXTERNAL_INLINE_LINK: https://www.zotero.org/groups/1051264/seshat_databank/items/itemKey/KK2E3KMD .;
279 Parthian Empire II present Confident Expert -
According to ancient authors the Parthians built caravanserei and constructed bridges to encourage trade. [1]

[1]: (Raschke 1976, 820) Raschke, Manfred G. in Haase, Wolfgang ed. 1976. Politische Geschichte (Provinzen und Randvölker: Mesopotamien, Armenien, Iran, Südarabien, Rom und der Ferne Osten). Walter de Gruyter.


280 Abbasid Caliphate II present Inferred Expert -
-
281 Pre-Ceramic Period unknown Suspected Expert -
-
282 Formative Period unknown Suspected Expert -
-
283 Susiana - Muhammad Jaffar unknown Suspected Expert -
-
284 Susiana B unknown Suspected Expert -
-
285 Susiana - Early Ubaid unknown Suspected Expert -
-
286 Susiana - Late Ubaid unknown Suspected Expert -
-
287 Susa I unknown Suspected Expert -
-
288 Elam - Awan Dynasty I present Inferred Expert -
"Other major administrative achievements of the Elamites included ... the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers..." [1] -- which period?

[1]: (Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.


289 Elam - Early Sukkalmah present Confident Expert -
[1] "Other major administrative achievements of the Elamites included ... the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers" [2]

[1]: Hinz 1971, 262

[2]: (Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.


290 Elam - Late Sukkalmah present Confident Expert -
[1] "Other major administrative achievements of the Elamites included ... the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers" [2]

[1]: Hinz 1971, 262

[2]: (Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.


291 Elam - Kidinuid Period unknown Suspected Expert -
-
292 Elam - Igihalkid Period present Inferred Expert -
"Other major administrative achievements of the Elamites included ... the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers" [1]

[1]: (Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.


293 Elam - Shutrukid Period present Inferred Expert -
"Other major administrative achievements of the Elamites included ... the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers" [1]

[1]: (Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.


294 Elam II present Confident Expert -
"Other major administrative achievements of the Elamites included ... the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers" [1]

[1]: (Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.


295 Elam III present Inferred Expert -
"Other major administrative achievements of the Elamites included ... the construction and maintenance of numerous public works and enterprises, such as roads, bridges, cities and towns, communication centers, and economic and commercial centers" [1]

[1]: (Farazmand 2009, 22) Farazmand, Ali. 2009. Bureaucracy and Administration. CRC Press. Boca Raton.


296 Macedonian Empire present Inferred -
-
297 Elymais II present Inferred Expert -
"Elymais coined its own money, conducted its own public works programs" [1] "Elymais’ emergence as an independent state was paralelled by the rise of Characene (also called Mesene), and Arab state at the head of the Persian Gulf and centered at the city of Spasinu Charaz. Both Elymais and Characene controlled important trade routes connecting the Iranian plateau and Mesopotamia with sea and land routes from India and China." [1]

[1]: (Wenke 1981, 306) Wenke, Robert J. 1981. Elymeans, Parthians, and the Evolution of Empires in Southwestern Iran. Journal of the American Oriental Society. Vol. 101. No. 3. Jul-Sep. American Oriental Society. pp. 303-315. http://www.jstor.org/stable/602592


298 Ak Koyunlu present Confident Expert -
"There are abundant material remains and other nonwritten sources for the Aq-quyunlu period. Metin Sozen has catalogued nearly one hundred Aqquyunlu architectural structures in almost thirty locales in Anatolia alone. These buildings include mosques, madrasas, tombs, hospices, markets, caravanserais, baths, bridges, fountains, palaces, and fortifications. Unfortunately, no similar work exists for these monuments constructed in Iran during the imperial period, many of which have now disappeared." [1]

[1]: (Woods 1998, 218)


299 Qajar present Inferred Expert -
Few passable roadways (suggesting there were some). [1]

[1]: (Martin 2005, 15) Vanessa Martin. 2005. The Qajar Pact: Bargaining, Protest and the State in Nineteenth-Century Persia. I. B. Tauris. London.


300 Badarian absent Inferred Expert -
-
301 Naqada I absent Inferred Expert -
-
302 Naqada II absent Inferred Expert -
-
303 Egypt - Dynasty 0 absent Inferred Expert -
-
304 Egypt - Dynasty I present Inferred Expert -
Earliest reference to small bridge is for the new kingdom. Bridges over wide expanse of water unknown. [1] However, it is highly probable that small bridges were necessary before this time and Egyptians would have been more than capable of building and maintaining them.

[1]: (Arnold 2003, 37)


305 Egypt - Dynasty II present Inferred Expert -
Earliest reference to small bridge is for the new kingdom. Bridges over wide expanse of water unknown. [1] However, it is highly probable that small bridges were necessary before this time and Egyptians would have been more than capable of building and maintaining them.

[1]: (Arnold 2003, 37)


306 Egypt - Classic Old Kingdom present Inferred Expert -
Earliest reference to small bridge is for the new kingdom. Bridges over wide expanse of water unknown. [1] However, it is highly probable that small bridges were necessary before this time and Egyptians would have been more than capable of building and maintaining them.

[1]: (Arnold 2003, 37)


307 Egypt - Late Old Kingdom present Inferred Expert -
Earliest reference to small bridge is for the new kingdom. Bridges over wide expanse of water unknown. [1] However, it is highly probable that small bridges were necessary before this time and Egyptians would have been more than capable of building and maintaining them.

[1]: (Arnold 2003, 37)


308 Egypt - Period of the Regions present Inferred Expert -
Earliest reference to small bridge is for the new kingdom. Bridges over wide expanse of water unknown. [1] However, it is highly probable that small bridges were necessary before this time and Egyptians would have been more than capable of building and maintaining them.

[1]: (Arnold 2003, 37)


309 Egypt - Middle Kingdom present Inferred Expert -
Earliest reference to small bridge is for the new kingdom. Bridges over wide expanse of water unknown. [1] However, it is highly probable that small bridges were necessary before this time and Egyptians would have been more than capable of building and maintaining them.

[1]: (Arnold 2003, 37)


310 Egypt - Thebes-Hyksos Period unknown Suspected Expert -
Earliest reference to small bridge is for the new kingdom. Bridges over wide expanse of water unknown. [1] However, it is highly probable that small bridges were necessary before this time and Egyptians would have been more than capable of building and maintaining them.

[1]: (Arnold 2003, 37)


311 Egypt - Kushite Period present Inferred Expert -
Small bridges existed in Ramesside Egypt. [1]

[1]: (Arnold 2003, 37)


312 Oaxaca - Tierras Largas absent Inferred Expert -
Sources do not suggest there is evidence for bridges in this period. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


313 Oaxaca - San Jose absent Inferred Expert -
Sources do not suggest there is evidence for bridges in this period. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


314 Oaxaca - Rosario absent Inferred Expert -
Sources do not suggest there is evidence for the construction of bridges during this period. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


315 Early Monte Alban I absent Confident Expert -
Sources do not suggest there is evidence for the construction of bridges during this period. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


316 Monte Alban Late I absent Confident Expert -
Sources do not suggest there is evidence for the construction of bridges during this period. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


317 Monte Alban II absent Confident Expert -
Sources do not suggest there is evidence for the construction of bridges during this period. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


318 Monte Alban III absent Confident Expert -
Sources do not suggest there is evidence for the construction of bridges during this period. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


319 Monte Alban IIIB and IV absent Inferred Expert -
Sources do not suggest there is evidence for bridges in prehispanic Valley of Oaxaca. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


320 Monte Alban V Early Postclassic absent Inferred -
-
321 Monte Alban V Late Postclassic absent Inferred -
-
322 Monte Alban V absent Inferred Expert -
There is no evidence for bridges in prehispanic Valley of Oaxaca. [1]

[1]: Marcus and Flannery (1996) Zapotec Civilization: How urban society evolved in Mexico’s Oaxaca Valley. Flannery and Marcus (1983) The Cloud People: divergent evolution of the Zapotec and Mixtec civilizations. Museum of Anthropology, University of Michigan, Ann Arbor. Academic Press, New York.


323 Yemen - Qasimid Dynasty unknown Suspected Expert -
-
324 Ottoman Empire Late Period absent Confident -
-
325 Republic of Venice III present Confident Expert -
"Each town possessed its own special code, called the Statuto, which the Rectors swore to observe. The Statuto dealt with octroi dues, roads and bridges, wells, lighting, doctors, nurses, fires, guilds, santitary matters, - in short with all the multifarous details of municipal and even of private life." [1]

[1]: (? 1902, 263) ?. Chapter VIII. Venice. A W Ward. G W Prothero. Stanley Leathes. eds. 1902. The Cambridge Modern History. Volume I. The Renaissance. Cambridge University Press. Cambridge.


326 Republic of Venice IV present Confident Expert -
"Each town possessed its own special code, called the Statuto, which the Rectors swore to observe. The Statuto dealt with octroi dues, roads and bridges, wells, lighting, doctors, nurses, fires, guilds, santitary matters, - in short with all the multifarous details of municipal and even of private life." [1]

[1]: (? 1902, 263) ?. Chapter VIII. Venice. A W Ward. G W Prothero. Stanley Leathes. eds. 1902. The Cambridge Modern History. Volume I. The Renaissance. Cambridge University Press. Cambridge.


327 Hohokam Culture unknown Suspected -
-
328 Antebellum US present Confident -
Bridges were present across the US. [1]

[1]: Volo and Volo 2004: 32, 134. https://www.zotero.org/groups/1051264/seshat_databank/items/SIB5XSW97.


329 Austria - Habsburg Dynasty I present Confident -
Bridges were present, built and maintained throughout the period. [1]

[1]: (Curtis 2013: 48) Curtis, Benjamin. 2013. The Habsburgs: The History of a Dynasty. London; New York: Bloomsbury. https://www.zotero.org/groups/1051264/seshat_databank/items/TRKUBP92


330 Napoleonic France present Confident -
Bridges were built and maintained across France. [1]

[1]: Clapham 1955: 147-150. https://www.zotero.org/groups/1051264/seshat_databank/items/2QKQJQM3.


331 Austria - Habsburg Dynasty II present Confident -
“Though some division of labor took place during the eighteenth century, nobles as a class remained responsible for oversight of taxation for military purposes; upkeep of bridges, roads, and hospitals; village government; regulation of building projects, commerce and trade policy; property registration and surveying; and police and fire protection.” [1]

[1]: (Fichtner 2003: 77) Fichtner, Paula Sutter. 2003. The Habsburg Monarchy, 1490-1848: Attributes of Empire. Macmillan International Higher Education. https://www.zotero.org/groups/1051264/seshat_databank/items/QQ77TV4K


332 Kingdom of Bohemia - Luxembourgian and Jagiellonian Dynasty present Confident -
“By the end of the twelfth century stone houses surrounded the marketplace in Prague’s Old Town, and in 1172 a stone bridge, the oldest in Central Europe after Regensburg’s, was built with the support of Vladislav II’s wife, Judita.” [1] “The Judita bridge in Prague has already been mentioned; not until the second half of the thirteenth century would the stone bridge at Pisek rival this achievement.” [2] “Bohemia’s well-being was central to Charles’s concerns, and in spite of dynastic and imperial involvements, he devoted himself to it. His choice of Prague for his residence stimulated a building boom that brought foreign-born masters such as Matthias of Arras and Peter Parler of Gmiind to Prague. These artists worked on the reconstruction of the castle, including St. Vitus’s cathedral, in Gothic style. Parler’s workshop contributed the church of the Virgin Mary before Tyn in Prague’s Old Town, and other Gothic churches in Kolin and Kutna Hora. A new stone bridge replaced the Judita bridge, joining Prague’s Old Town with the Lesser Quarter beneath the castle.” [3]

[1]: (Agnew 2004: 18) Agnew, Hugh LeCaine. 2004. The Czechs and the Lands of the Bohemian Crown. California: Hoover Institution Press. http://archive.org/details/czechslandsofboh0000agne. https://www.zotero.org/groups/1051264/seshat_databank/items/6LBQ5ARI

[2]: (Agnew 2004: 24) Agnew, Hugh LeCaine. 2004. The Czechs and the Lands of the Bohemian Crown. California: Hoover Institution Press. http://archive.org/details/czechslandsofboh0000agne. https://www.zotero.org/groups/1051264/seshat_databank/items/6LBQ5ARI

[3]: (Agnew 2004: 33-35) Agnew, Hugh LeCaine. 2004. The Czechs and the Lands of the Bohemian Crown. California: Hoover Institution Press. http://archive.org/details/czechslandsofboh0000agne. https://www.zotero.org/groups/1051264/seshat_databank/items/6LBQ5ARI


333 Early United Mexican States present Confident -
“Although the pomp and circumstance of Santa Anna was and is easy to caricature and malign, his rule was not all tinsel, smoke, and mirrors; it was good for business. During the 1850s, his policies renewed educational and cultural institutions while improving transportation, subsidizing telegraphs, and repairing roads and bridges .” [1] “In southern Mexico, along the Isthmus of Tehuantepec, railroads facilitated the conquest of the harsh terrain by providing a safe path for poor Mexicans to travel, either in economy cars or on foot. In some areas, for instance, railroad bridges were the only safe routes across gorges and rivers.”

[1]: (Bunker and Macias-Gonzalez 2011: 54) Bunker, Steven B. and Macías-González, Víctor M. 2011. “Consumption and Material Culture from Pre-Contact through the Porfiriato,” in A Companion to Mexican History and Culture, ed. William H. Beezley. Chichester: Wiley-Blackwell. pp54–82. https://www.zotero.org/groups/1051264/seshat_databank/items/SDIQ5VE7


334 Spanish Empire II present Confident Expert 1716 CE 1814 CE
“Yet, as this achievement became a reality, the definition of the ‘godly commonwealth’ itself was beginning to change, as more emphasis was put on good citizenship rather than on storming the heavens with prayer. ‘Building bridges, making roads’ is a ‘pious work’ as good as any other, commented Ponz at the end of the Old Regime, as he gave reference after reference to bishops setting up workshops, distributing spindles, wool and flax to the poor. He cited with approval the letter of the archbishop of Toledo to the priests of his diocese in 1779, urging them to take an interest in the material welfare of their parishioners.”(Casey 2002: 248) Casey, James. 2002. Early Modern Spain: A Social History. New York: Routledge. https://www.zotero.org/groups/seshat_databank/items/itemKey/2SNTRSWT
335 Russian Empire, Romanov Dynasty II present Confident Expert -
Great Stone Bridge in Moscow: Also known as the Bolshoy Kamenny Bridge, it was originally a wooden bridge built in the 17th century over the Moskva River. In the early 18th century, during the reign of Peter the Great, it was reconstructed in stone, reflecting the era’s advancements in bridge construction. [1]

[1]: S. O. Shmidt, M. I. Andreev, and V. M. Karev, eds., Moskva: Ėnt︠s︡iklopedii︠a︡, Biblioteka Istorii︠a︡ Moskvy s drevneĭshikh vremen do nashikh dneĭ (Moskva: Nauchnoe izd-vo “Bolʹshai︠a︡ rossiĭskai︠a︡ ėnt︠s︡iklopedii︠a︡,” 1997). Zotero link: 28L5IKZJ


336 Austro-Hungarian Monarchy present Confident -
Present since previous polity. Bridges were present, built and maintained throughout the period. [1]

[1]: Curtis 2013: 48. https://www.zotero.org/groups/1051264/seshat_databank/items/TRKUBP92.


337 Golden Horde present Confident -
There were manned river crossing stations in the territory. [1]

[1]: Schamiloglu 2018: 21. https://www.zotero.org/groups/1051264/seshat_databank/items/4DIB5VCX


338 Anglo-Saxon England I present Confident -
Bridges were built during the Roman occupation of the region and maintained by soldiers. [1] “One important innovation was the burh or fortress which could be used both as a local refuge and as a base for a militia to intercept Viking forces and hamper their manoeuvrability. When Offa ruled Kent he had introduced the public services of fortress-work and bridge-work to help counter the first Viking attacks on the province so when the West Saxons conquered Kent they inherited the Mercian burhs there. [2]

[1]: (Yorke 1990: 125) York, Barbara. 1990. Kings and Kingdoms of Early Anglo-Saxon England. London: Routledge. https://doi.org/10.4324/9780203447307. https://www.zotero.org/groups/1051264/seshat_databank/items/YXTNCWJN

[2]: (Yorke 1990: 152) York, Barbara. 1990. Kings and Kingdoms of Early Anglo-Saxon England. London: Routledge. https://doi.org/10.4324/9780203447307. https://www.zotero.org/groups/1051264/seshat_databank/items/YXTNCWJN


339 Us Reconstruction-Progressive present Confident -
Bridges were present across the US since preceding period. [1]

[1]: Volo and Volo 2004: 32, 134. https://www.zotero.org/groups/1051264/seshat_databank/items/SIB5XSW97.


340 Alaouite Dynasty I present Confident -
“Mawlây Rashïd built the biggest madrasa (college) in Fez… Among his monumental works he was responsible for the construction of the bridge over the Wâdï Sebû, fifteen kilometres east of Fez.” [1]

[1]: (Ogot 1992: 219) Ogot, B. A. 1992. ed., General History of Africa: Africa from the Sixteenth to the Eighteenth Century., vol. V, VII vols. Oxford: Heinemann Educational Books Ltd. https://www.zotero.org/groups/1051264/seshat_databank/items/24QPFDVP


341 Plantagenet England present Confident -
Bridges were present across the territory and were a vital for of maintaining communication across the country. [1]

[1]: (Prestwich 2005: 24) Prestwich, Michael. 2005. Plantagenet England 1225-1360. Oxford: Oxford University Press. https://www.zotero.org/groups/1051264/seshat_databank/items/XTBKFDCI


342 British Empire I present Confident -
Present throughout the Empire. [1]

[1]: (Colquhoun 1811: 228-233) Colquhoun, Patrik. 1814. Treatise on the Wealth, Power and Resources of the British Empire in Every Quarter of the World Etc. Jos. Mawman. https://www.zotero.org/groups/1051264/seshat_databank/items/3SNZA6FJ


343 Russian Empire, Romanov Dynasty I present Confident Expert -
Great Stone Bridge in Moscow: Also known as the Bolshoy Kamenny Bridge, it was originally a wooden bridge built in the 17th century over the Moskva River. In the early 18th century, during the reign of Peter the Great, it was reconstructed in stone, reflecting the era’s advancements in bridge construction. [1]

[1]: S. O. Shmidt, M. I. Andreev, and V. M. Karev, eds., Moskva: Ėnt︠s︡iklopedii︠a︡, Biblioteka Istorii︠a︡ Moskvy s drevneĭshikh vremen do nashikh dneĭ (Moskva: Nauchnoe izd-vo “Bolʹshai︠a︡ rossiĭskai︠a︡ ėnt︠s︡iklopedii︠a︡,” 1997). Zotero link: 28L5IKZJ


344 Soviet Union present Confident Expert 1923 CE 1991 CE
The Soviet Union invested heavily in its road infrastructure, especially during the post-World War II era, to facilitate industrial growth, military movement, and improve connectivity across its vast territory.
The economic centralization of the late 1920s and 1930s led to massive and rapid infrastructure development.
[1] [2]


Examples: Merefa-Kherson bridge, Bolshoy Kamenny Bridge, Saratov Bridge

[1]: R. W. Davies, Mark Harrison, and S. G. Wheatcroft, eds., The Economic Transformation of the Soviet Union, 1913-1945 (Cambridge ; New York: Cambridge University Press, 1994). Zotero link: SQIKYBTN

[2]: Шафиркин, Б. И. Единая Транспортная Система СССР и Взаимодействие Различных Видов Транспорта. Москва Высшая школа, 1983. Zotero link: 6MTCGJDC


345 Anglo-Saxon England II present Confident -
Bridges were built during the Roman occupation of the region and maintained by soldiers. [1] “One important innovation was the burh or fortress which could be used both as a local refuge and as a base for a militia to intercept Viking forces and hamper their manoeuvrability. When Offa ruled Kent he had introduced the public services of fortress-work and bridge-work to help counter the first Viking attacks on the province so when the West Saxons conquered Kent they inherited the Mercian burhs there. [2]

[1]: (Yorke 1990: 125) York, Barbara. 1990. Kings and Kingdoms of Early Anglo-Saxon England. London: Routledge. https://doi.org/10.4324/9780203447307. https://www.zotero.org/groups/1051264/seshat_databank/items/YXTNCWJN

[2]: (Yorke 1990: 152) York, Barbara. 1990. Kings and Kingdoms of Early Anglo-Saxon England. London: Routledge. https://doi.org/10.4324/9780203447307. https://www.zotero.org/groups/1051264/seshat_databank/items/YXTNCWJN


346 Middle and Late Nok absent Inferred -
"There are [...] no signs of communal construction activities, and no preserved facilities to store agricultural surplus. [...] It has to be considered that the preservation of features in Nok sites is generally poor and that the amount of data is not too large and regionally restricted to a rather small key study area." [1]

[1]: (Breunig and Ruppe 2016: 253) Seshat URL: https://www.zotero.org/groups/1051264/seshat_databank/collections/GWWIKDDM/ES4TRU7R.


347 Kanem unknown Suspected -
The near-absence of archaeologically identified settlements makes it particularly challenging to infer most building types. "While the historical sources provide a vague picture of the events of the first 500 years of the Kanem-Borno empire, archaeologically almost nothing is known. [...] Summing up, very little is known about the capitals or towns of the early Kanem- Borno empire. The locations of the earliest sites have been obscured under the southwardly protruding sands of the Sahara, and none of the later locations can be identified with certainty." [1]

[1]: (Gronenborn 2002: 104-110)


348 Middle and Late Nok absent Inferred -
"There are [...] no signs of communal construction activities, and no preserved facilities to store agricultural surplus. [...] It has to be considered that the preservation of features in Nok sites is generally poor and that the amount of data is not too large and regionally restricted to a rather small key study area." [1]

[1]: (Breunig and Ruppe 2016: 253) Seshat URL: https://www.zotero.org/groups/1051264/seshat_databank/collections/GWWIKDDM/ES4TRU7R.


349 Dambadaneiya present Confident -
"Parakramabahu II had devoted attention to this region when his minister Devapatiraga founded Viharas and improved the lines of communications by the construction of bridges across the streams, on behalf of the pilgrims to Samantakuta." THESIS
350 Dutch Empire present Confident -
"Apart from provincial revenue, cities had their own revenue from excise (particularly beer and wine) and from duties levied on their markets, ferries, bridges, roads, and streets." [1]

[1]: (t’Hart 1989: 672) Seshat URL: https://www.zotero.org/groups/1051264/seshat_databank/collections/7F5SEVNA/items/B9DVQGBS/collection.


351 Adal Sultanate present Inferred -
Imām Ahmad led many military campaigns along the Awash River in present-day Ethiopia. “In 1531 he returned to the Shoan plateau by way of Dawaro, where he crushed the isolated resistance movements, and marched on to the upper waters of the Awash in pursuit of the emperor.” [1]

[1]: (Tamrat 2008, 173) Tamrat, Taddesse. 2008. ‘Ethiopia, the Red Sea and the Horn’ In the Cambridge History of Africa: c. 1050 – c.1600 vol. 3. Cambridge: Cambridge University Press. Pp 98-182. Seshat URL: https://www.zotero.org/groups/1051264/seshat_databank/search/Tamrat/titleCreatorYear/items/A68FCWWI/item-list


352 Tunni Sultanate present Confident -
“Barawa has many two-story houses with bridges constructed over the streets, built so that women or the elderly could visit other houses without going down into the street.” [1]

[1]: (Mukhtar 2003, 51) Mukhtar, Mohamed H. 2003. Historical Dictionary of Somalia. Lanham, Maryland: Scarecrow Press. Seshat URL: https://www.zotero.org/groups/1051264/seshat_databank/collections/TWITJWK4/items/J8WZB6VI/collection


353 Early Sultanate of Aussa present Confident -
“The main road runs along its western side and I later heard that on this road were bridges constructed in ancient times by the Arabs, which I should much like to have inspected.” [1]

[1]: (Thesiger 1935, 16) Thesiger, Wifred. 1935. ‘The Awash River and the Aussa Sultanate.’ The Geographical Journal. Vol. 85:1. Pp 1-19 Seshat URL: https://www.zotero.org/groups/1051264/seshat_databank/items/APBB7BBK/library


354 Oyo unknown Suspected -
"Contexts that could shed light on the dynamics of social structure and hierarchies in the metropolis, such as the royal burial site of Oyo monarchs and the residences of the elite population, have not been investigated. The mapping of the palace structures has not been followed by systematic excavations (Soper, 1992); and questions of the economy, military system, and ideology of the empire have not been addressed archaeologically, although their general patterns are known from historical studies (e.g, Johnson, 1921; Law, 1977)." [1] Regarding this period, however, one of the historical studies mentioned in this quote also notes: "Of the earliestperiod of Oyo history, before the sixteenth century, very little is known." [2] Law does not then go on to provide specific information directly relevant to this variable.

[1]: (Ogundiran 2005: 151-152)

[2]: (Law 1977: 33)


355 Foys present Confident -
“[A] passage was cut through the wood at Apoy; the gullies were filled up, and the hurdle bridges, over the swamps, were widened.” [1]

[1]: Alpern, S. B. (1999). Dahomey’s Royal Road. History in Africa, 26, 11–24: 13. https://www.zotero.org/groups/1051264/seshat_databank/collections/GWWIKDDM/items/J4ZASAV6/collection


356 Benin Empire present Confident -
“Since the thirteenth century, as Egharevba explains, “every Oba has to cross a bridge at Isekherhe quarter on his coronation day, and on the seventh day, fight with Ogiamien in memory of the victory of that day.”” [1]

[1]: Osadolor, O. B. (2001). The Military System of Benin Kingdom, c.1440–1897. University of Hamburg, Germany: 62. https://www.zotero.org/groups/1051264/seshat_databank/collections/GWWIKDDM/items/N4RZF5H5/collection


357 Buganda present Confident -
"By the nineteenth century, state labour was locally-organised. In much the same way that ’labour armies’20 were drafted to build enclosures for the kabaka, the ssaza chiefs and their subordinates commanded local labour on behalf o f the state. The primary function of this labour was the construction of roads and bridges, and occasionally public buildings, while the clearing of forest and bush were also common operations." [1]

[1]: (Reid 2010: 259) Seshat URL: https://www.zotero.org/groups/1051264/seshat_databank/collections/GWWIKDDM/items/2H64W34U/collection.


358 British Empire IIIIIIIIII present Confident -
The existing transport infrastructure in the UK was developed throughout the Empire at great expense. [1]

[1]: ( Porter 1999: 129, 254-56, 351, 529, 660, 685, 702) Porter, Andrew, ed. 1999. The Oxford History of the British Empire: The Nineteenth Century, vol. 3, 5 vols. Oxford, New York: Oxford University Press. https://www.zotero.org/groups/1051264/seshat_databank/items/GTF9V4CG


359 Holy Roman Empire - Ottonian-Salian Dynasty present Confident -
Bridges were present across the Empire and continued to be improved and added to for trade and communication purposes, especially from the early twelfth century. [1]

[1]: Power 2006: 10. https://www.zotero.org/groups/1051264/seshat_databank/items/4V4WE3ZK