Built against the inside of the east face of the walls, the episcopy is a rectangular room with two levels: the lower level is vaulted and the upper level has a wooden roof. Built at the end of the 12th century, it is the only civil building conserved in the town from the Romanesque period. The entrance has a semi-circular arch built of Caleno granite and the same material has been used on the flared windows of the main front.
It is municipal property, has now been restored and is used for cultural purposes.