Founded in the 5C., the present-day buildings mostly date back to the 14C. Its facade is decorated with a beautiful rose window, a bas relief and busts in bronze, and it is dominate by a robust bell tower decorated with reused Roman columns and the statue of Saint Just. Inside there are five naves, of which four belonged to two primitive basilicas, and connected by the fifth one. A beautiful 12C. mosaic. The Virgin is accompanied by the Archangels Michael and Gabriel, and by the Apostles.