A city in southwest France occupied as early as the 5th century BC by the Iberians and then by Gallo-Romans. Its inner rampart was built in 485 AD. The site is one of the best-preserved examples of a medieval fortified town in Europe with an inner wall and citadel dating from 11th-13th centuries. The site was extensively restored in the 19th century and the church of Saint-Vincent and the cathedral of Saint-Michel, both 13th century, survive.