Sant Pèire e Sant Pau de Magalona Cathedral, Romanesque cathedral on an isthmus in Villeneuve-lès-Maguelone, France

Sant Pèire e Sant Pau de Magalona Cathedral is a 12th–13th-century Romanesque building of pale beige masonry. A square tower with slit openings stands left of a facade with a round window and an arched portal; a low plinth runs along the walls. Inside, a pointed barrel vault on thick rounded arches covers the nave, ending in a semicircular apse with three narrow windows above a stone altar.

A bishopric was established on the island in 533, and a cathedral existed there by the late 6th century. In 737 Charles Martel destroyed that first cathedral, which the Saracens had turned into a mosque. From 1030 Bishop Arnaud rebuilt the cathedral; the present Romanesque church was begun under Bishop Galtier (1104–1129), who built the chevet and fortified transept.

The name Maguelone comes from the island where the cathedral stands, once the site of the original city. The building is run by the preservation society Les Compagnons de Maguelone, which maintains it and opens it for both religious and secular uses. Pope Urban II visited in 1096 and called it "second only to that of Rome."

The cathedral sits on a strip of land surrounded by water and can be reached on foot from Villeneuve-lès-Maguelone or by car from Palavas-les-Flots. Since the location is somewhat isolated, allow extra time for travel and come prepared for changing weather conditions typical of lakeside areas.

The cathedral was once the seat of the Bishop of Maguelone until 1563, when the see was transferred to the newly created Bishopric of Montpellier. Pope Urban II visited the island in 1096 and called the cathedral "second only to that of Rome".