Ancient remains of Constantine the Great's Bridge have emerged from the Danube near the Bulgarian village of Gigen after exceptionally low river levels exposed parts of the Roman structure, offering archaeologists a rare chance to study one of antiquity's greatest engineering achievements. The unusually low water levels are the result of prolonged drought caused by a series of record-breaking heat waves across Europe this summer.

Exceptionally low water levels on the Danube have exposed parts of the foundations of the ancient Constantine Bridge, giving Bulgarian archaeologists a rare opportunity to…

Ancient remains of Constantine the Great's Bridge have emerged from the Danube near the Bulgarian village of Gigen after exceptionally low river levels exposed parts of the Roman…