The Constantine's Bridge was a late antique bridge

Roman bridge

Roman bridges, built by ancient Romans, were the first large and lasting bridges built. Roman bridges were built with stone and had the arch as its basic structure....

 in Mysia

Mysia

Mysia was a region in the northwest of ancient Asia Minor or Anatolia . It was located on the south coast of the Sea of Marmara. It was bounded by Bithynia on the east, Phrygia on the southeast, Lydia on the south, Aeolis on the southwest, Troad on the west and by the Propontis on the north...

, modern-day Turkey

Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

.

The structure, built after 258 AD, crossed the river Rhyndacus (modern Adırnas Çayı) at Uluabat (Lopadium). It was crowned in Byzantine times

Byzantine Empire

The Byzantine Empire was the Eastern Roman Empire during the periods of Late Antiquity and the Middle Ages, centred on the capital of Constantinople. Known simply as the Roman Empire or Romania to its inhabitants and neighbours, the Empire was the direct continuation of the Ancient Roman State...

 by a chapel

Chapel

A chapel is a building used by Christians as a place of fellowship and worship. It may be part of a larger structure or complex, such as a church, college, hospital, palace, prison or funeral home, located on board a military or commercial ship, or it may be an entirely free-standing building,...

 dedicated by S. Helena to emperor

Emperor

An emperor is a monarch, usually the sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife or a woman who rules in her own right...

 Constantine I

Constantine I

Constantine the Great , also known as Constantine I or Saint Constantine, was Roman Emperor from 306 to 337. Well known for being the first Roman emperor to convert to Christianity, Constantine and co-Emperor Licinius issued the Edict of Milan in 313, which proclaimed religious tolerance of all...

 (r. 324-337 AD). Only few remains have survived: at the beginning of the 20th century, the English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 archaeologist Frederick William Hasluck

Frederick William Hasluck

Frederick William Hasluck was an English antiquarian, historian, and archaeologist.Hasluck was educated at The Leys School and King's College, Cambridge. Graduating in 1904 , he went to the British School at Athens. There he helped on excavations in Laconi, Geraki, Angelona, Cyzicus and Bithynia,...

 reported no arch as complete, and only a few ruined piers on the north bank. The masonry consisted of ashlar-faced rubble.

Apart from Constantine's Bridge, other partly remarkably well preserved Roman bridge

Roman bridge

Roman bridges, built by ancient Romans, were the first large and lasting bridges built. Roman bridges were built with stone and had the arch as its basic structure....

s have survived in Mysia, known by the rivers they cross as the Makestos Bridge

Makestos Bridge

The Macestos Bridge or Bridge of Sultançayır was a Roman segmental arched bridge across the Macestos River at Balıkesir, in the northwestern part of modern-day Turkey. Its flattened arches, slender piers and the hollow chamber system documented the progress made in late antique bridge building...

, the Aesepus Bridge

Aesepus Bridge

The Aesepus Bridge was a late antique Roman bridge over the Aesepus river in the ancient region of Mysia in modern-day Turkey. It is notable for its advanced hollow chamber system which has also been employed in other Roman bridges in the region, such as the Makestos Bridge...

 and the White Bridge

White Bridge (Mysia)

The White Bridge was a Roman bridge across the river Granicus in Mysia in the north west of modern-day Turkey. Presumably constructed in the 4th century AD, it belonged in Ottoman times to the important road to Gallipoli on the Dardanelles...

 over the Granicus

Granicus

The Biga River is a small river or large creek in Çanakkale Province in northwestern Turkey. The river begins at the base of Mount Ida and trends generally northeasterly to the Sea of Marmara. It is located approximately 50 km to the east of the Dardanelles. It flows past the towns of Çan...

.

See also

• List of Roman bridges
• Roman architecture
  Roman architecture
  Ancient Roman architecture adopted certain aspects of Ancient Greek architecture, creating a new architectural style. The Romans were indebted to their Etruscan neighbors and forefathers who supplied them with a wealth of knowledge essential for future architectural solutions, such as hydraulics...
  
  
• Roman engineering
  Roman engineering
  Romans are famous for their advanced engineering accomplishments, although some of their own inventions were improvements on older ideas, concepts and inventions. Technology for bringing running water into cities was developed in the east, but transformed by the Romans into a technology...