Built by Vauban between 1667 and 1672, the Citadel has been nicknamed La belle inutile (the beautiful useless one) by residents as it has never been directly involved in heavy fighting and didn't prevent the Germans from occupying the city in either World War. Since 7 July 2008 it has been part of the UNESCO World Heritage Sites Fortifications of Vauban which includes eleven other fortifications. Within the citadel on the side of La Place de Manœuvre a small Baroque-style chapel was built. Outside, Le Mur des Fusillés (the wall of the people executed by a firing squad) pays tribute to the 218 members of the French Resistance shot in the citadel's ditch during World War II.