Dating back to the 14th century, this vaulted cellar served as the town jail from 1795, as a military lock-up in the 19th century, then as a place of internment during WWII for those caught trying to flee to nominally neutral Spain. The lower section dates from the 13th century, when St-Jean Pied de Port was a bishopric of the Avignon papacy; the building above it dates from the 16th century. Inside can be found seasonal exhibitions.
