tower, built at the end of the XIIIth Century, on the west facade
in the narrowest part of the lists,
is so named because of the proximity of the old Episcopal palace.
The square structure rises above two lines of fortification
where a vaulted passageway with cross-ribbed
vaults ensured circulation in the lists. The flat buttresses
that support these corners are topped with watch
towers designed to defend the Aude Gate.