Pont Vieux of Béziers, Medieval stone bridge in Béziers, France.

Pont Vieux of Béziers is a stone arch bridge below the Saint-Nazaire cathedral, 241.50 m long with 15 unequal round arches: 7 cross the Orb and 8 span the flood bed opposite the old town. Its original width was 3.45 m; in the 15th century it was widened to 5.20 m by adding slightly larger arches at the sides. Small triangular openings sit above the piers, and plants grow from the light tan masonry.

The bridge is first documented in 1134, though its original construction date is unknown. It long remained the only crossing of the Orb on the trade road between Provence and Toulouse. Major repairs are recorded in 1341 and 1526, and the bridge was widened to 5.20 m, probably in the 15th century. A defensive tower was demolished in 1768.

The bridge's name, 'Old Bridge', is a modern label; medieval charters call it simply the bridge over the Orb, and Charles VII and Louis XI praised its antiquity in letters patent to the consuls of Béziers. A defensive tower once guarded it until its demolition in 1768.

The bridge carries the one-way Avenue du Pont Vieux over the Orb, with a weight limit of 2 tonnes, so it is crossed on foot or by light vehicles. Its deck is 5.20 m wide, widened from an earlier 3.45 m. It stands below the Saint-Nazaire cathedral, and seven of its fifteen arches cross the river while eight span the flood bed opposite the old town.

The bridge is 241.50 m long and has 15 unequal round arches: 7 cross the Orb and 8 span the flood bed opposite the old town. Its original width was probably only 3.45 m, like the inner arches; in the 15th century it was widened to 5.20 m by adding slightly larger arches at the sides. A tower built to defend the bridge was demolished in 1768.