The belltower topped with its lantern cupola is the signal of the cathedral, to the south of the town, a little aside. In one of the lateral chapels off the vast 16C nave, a sculpted wood retable (1566) shows the episodes in the life of St Peter. The treasury is on show in the capitulary room and includes some silverwork and 16C tapestries: seven of them were sewn in Brussels and tell the story of Gédéon.