Fortified between 1685 and 1689 by the famous architect Vauban, the Citadelle of Blaye is part of the "Verrou Vauban", a UNESCO World Heritage site, along with Fort Pâté and Fort Médoc. This defensive triptych is unique in France! You can visit the Citadelle de Blaye and Fort Médoc, but Fort Pâté can only be seen from the Gironde estuary during a boat trip.
