The Sangarius Bridge or Bridge of Justinian is a late Roman bridge over the river Sakarya 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, to construct a navigable canal that would bypass the Bosporus.
Sangarius Bridge
Sketch of the surviving sections of the bridge, including the now vanished triumphal arch in the western end, and the apse in the eastern end (1838)
Image: Sangarius Bridge, a 430 m late Roman bridge over the river Sangarius built by the East Roman Emperor Justinian I to improve communications between the capital Constantinople and the eastern provinces of his empire, Turkey (26182712428)
Image: Sangarius Bridge, Justinyen Köprüsü
Bithynia was an ancient region, kingdom and Roman province in the northwest of Asia Minor, adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It bordered Mysia to the southwest, Paphlagonia to the northeast along the Pontic coast, and Phrygia to the southeast towards the interior of Asia Minor.
The Constantinople Gate in Nicaea