Great Bridge of Nemours, Stone arch bridge in Nemours, France.

The Great Bridge of Nemours is a stone arch bridge that spans the Loing River with multiple arches arranged in sequence to distribute weight across the water. The structure uses carefully shaped stone blocks fitted together in the classical manner, displaying skilled masonry from its construction period.

Construction took place between 1795 and 1804 under the design of engineer Jean-Rodolphe Perronet, one of France's most respected bridge builders of that era. The project emerged as part of a broader effort to improve roads and connections across the nation following the revolutionary period.

The bridge carries the D607 between rue de Paris and rue du Souvenir, linking the old centre to the eastern part of town. Two staircases at its ends let pedestrians reach the banks from the deck. Its three flattened arches, with a rise of about 1/15.6 of the span, are the flattest surviving in France since the Saint-Dié bridge was destroyed in 1944.

The bridge is accessible at any time and welcomes both pedestrians and vehicles crossing the river. Walking along both embankments gives you different views of the arches and their proportions from ground level.

Since the 1944 destruction of the Saint-Dié bridge by German troops, these are the flattest arches of any bridge in France, with a rise of only 1/15.6 of the span. Perronet's design required all arches to be struck at the same time so the abutments could balance their thrust.