History of Verdun-sur-Meuse

From 1624 to 1636, a large bastioned citadel was constructed on the site of the Abbey of Saint Vanne. In 1670, Vauban visited Verdun and drew up an ambitious scheme to fortify the whole city. Although much of his plan was built in the following decades, some of the elements were not completed until after the Napoleonic Wars. Despite the extensive fortifications, Verdun was captured by the Prussians in 1792, but abandoned by them after the Battle of Valmy. During the Napoleonic War, the citadel was used to hold British prisoners-of-war. In the Franco-Prussian War, Verdun was the last French fortress to surrender in 1870. Shortly afterwards, a new system of fortification was begun. This consisted of a mutually supporting ring of 22 polygonal forts up to 8 kilometres (5.0 mi) from the city, and an inner ring of 6 forts