Pont de Vieille-Brioude
Pont de Vieille-Brioude (Vieille-Brioude Bridge) is located in France, crossing the river Allier. It is a masonry arch bridge with a span of that was built in 1832. The predecessor of this bridge on the same site was probably built in 1479 and had a span of , making it the longest existing arch span for some three hundred years. The bridge was ordered by local resident Lady de Dombes and built by Grenier and Estone similar to how Pont Grand (Tournon-sur-Rhône) was later built. The completion of the bridge was delayed for  years because of some controversy. The bridge was too narrow, and its approaches were too steep to be used by carts. It collapsed on March 27, 1822, at 6 am. Before any stone bridge had been built on this site, there was a wooden bridge. Other very large medieval bridges