Legend has it that Charlemagne originally founded the abbey. The current building dates from the 12th Century and was built in travertine stone with decorative elements in onyx that give a special golden light to the monument. The exterior is very simple, with interesting geometric shapes and fantastic decorations on the portals. There is a square bell tower with mullioned windows that is decorated with bas-relief. The interior has a Romanesque shape with three naves, and columns alternating with pillars. The central nave is covered with trusses, while the lateral naves have vaulted ceilings. The naves meet in a great apse with three radiating chapels. On the right of the altar is the staircase that leads to the crypt, decorated by a Roman plaque and a fresco from the 15th Century, showing Piety. Only the main room of the monastery remains, dating from before the church. During the summer, concerts are held in the abbey, mostly consisting of organ music.
- Open Hours: Monday to Saturday from 11:00 AM to 06:00 PM, Sunday from 10:30 AM to 05:30 PM