Justinyanus Köprüsü

Sangarius Bridge
Sangarius Bridge
Coordinates	40°44′N 30°22′E / 40.74°N 30.37°E / 40.74; 30.37
Carries	Road from Constantinople to east in Byzantine times
Crosses	Çark Deresi (Antiquity: Sangarius)
Locale	Close to Adapazarı, Turkey
Characteristics
Design	Arch bridge Cutwaters on both sides
Material	Limestone blocks
Total length	429 m
Width	9.85 m
Height	10 m
Longest span	24.5 m
No. of spans	7 main arches + 5 floodways
Piers in water	6
History
Construction end	562 AD
Location

The Sangarius Bridge or Bridge of Justinian (Turkish: Justinianos Köprüsü or Beşköprü) is a late Roman bridge over the river Sakarya (Latin: Sangarius, Greek Σαγγάριος) in Anatolia, in modern-day Turkey. It was built by the East Roman Emperor Justinian I (527-565 AD) to improve communications between the capital Constantinople and the eastern provinces of his empire. With a remarkable length of 430 m, the bridge was mentioned by several contemporary writers, and has been associated with a supposed project, first proposed by Pliny the Younger to Emperor Trajan,^[1] to construct a navigable canal that would bypass the Bosporus.^[2]