Constantine's Bridge

Constantine's Bridge was a late antique bridge in Mysia, modern-day Turkey. The structure, built some time after 258 AD, crossed the river Rhyndacus (modern Adırnas Çayı) at Lopadium (modern Uluabat). It was crowned in Byzantine times by a chapel dedicated by Saint Helena to emperor Constantine I (r. 324–337 AD). Only few remains have survived: at the beginning of the 20th century, the English archaeologist Frederick William Hasluck reported no arch as complete, and only a few ruined piers on the north bank. The masonry consisted of ashlar-faced rubble.