The Château du Bois Thibault is a 15th-century ruins in Lassay-les-Châteaux, Mayenne, classified as a historic monument since 1925. Originally built on an 11th-century feudal site, the castle has undergone careful restoration efforts by volunteers. Today it stands as an open-air heritage site offering guided and self-guided visits during summer months from May to September, allowing visitors to explore the remnants of medieval defensive architecture just outside the town center.
