Saint-Maurice Cathedral in Mirepoix was built in Southern Gothic style over a long period between the 12th and 19th centuries. In the 19th century, the monument was restored under the direction of the famous architect Eugène Viollet-le-Duc, responsible for similar works on Notre-Dame de Paris, among other things. The rebuilding of the walls and the choir of the nave made it one of the widest in France, while Viollet-le-Duc took some liberties with the Languedoc Gothic style of the building. Saint-Maurice Cathedral was listed as a Historical Monument in 1907.