The Bridge of Justinian The Sangarius Bridge, also known as the Bridge of Justinian or Beşköprü, is a historic stone bridge spanning the river Sakarya, built during the reign of East Roman Emperor Justinian I (527-560 AD) to enhance communication between Constantinople and the Eastern provinces. This magnificent structure, with a length of 430 meters, was mentioned by various contemporary writers and has been linked with a purported Roman project to construct a canal that would circumvent the Bosporus. The bridge was strategically vital for both military and economic reasons as it served as a reliable alternative to the pontoon bridges that were often destroyed by flooding, resulting in loss of life. The Bridge of Justinian was not only a road but also a telegraph and post office all in one. Completed over 1500 years ago by Emperor Justinian I, it was the first attempt to revive the Roman Empire's greatness. This bridge strategically linked vital regions in the East and West of ancient civilizations, and its design showcased compelling visual symbolism, including a monumental triumphal arch and apsed structures at either end. The Bridge of Justinian stands as a remarkable example of the late Roman cultural accumulation of architectural and engineering expertise and its exceptional application in both military structures and public works. In recognition of its historical significance, the Bridge of Justinian was added to UNESCO's Tentative List in 2018.