Porte du midi dite Porte de fer

The Porte du Midi, also known as the "Iron Gate", is the only vestige of the fortifications of the ancient medieval city of Castillon-la-Bataille
This gate, which dates back to the 13th century, has a wall thickness of more than 7 metres. In the 19th and 20th centuries, it was transformed to be used, in particular, as a dwelling place. A passage allows to cross it: this last one is vaulted in full arch (Vienne Y Vienne street side) and vaulted in broken arch (river side)
The two other medieval gates of Castillon (the North Gate and the West Gate) disappeared in the 19th century.