Cathédrale Saint-Étienne
The cathedral of Saint-Etienne d'Agde is the former fortified cathedral of the bishopric of Agde, which existed from the 5th century until 1790. In 1173, Bishop Guillaume undertook to fortify the building on the foundations of an old Romanesque church from the 5th century, built on the site of an ancient Greek temple dedicated to Diana. The cathedral is one of the finest examples of a fortified Romanesque church in the region. St. Stephen's Cathedral is an impressive cathedral because of its black colour due to the volcanic stone, its fortifications and its proportions.