Roman Bridge

The Roman Bridge at Saint-Thibéry was a Roman bridge on the Via Domitia in southern France. The partly surviving structure crossed the river Hérault in Saint-Thibéry, 17 km east of Béziers.The ancient bridge had nine arches with spans of 10–12 m. The roadway rested on wide piers, which were protected on both sides by arched floodways and large cutwaters. The original length of the structure is estimated as 150 m , its road width as 4 m. The missing spans are known to have been destroyed by a flood some time before 1536.

Wikipedia