Godfrey of Bouillon sold the castle to the Prince-Bishopric of Liège to fund his participation in the First Crusade.
The castle stands on a ridge of schist, which was naturally fortified by the horseshoe-shaped meander of the Semois River.
French military engineer Sébastien Le Prestre de Vauban modified the castle in the 1680s, adding the distinct bastions seen today.
The castle's history includes a period where it functioned as a prison under the Dutch administration.
Remains of a 16th-century chapel are situated within the inner courtyard walls.
The fortress features a sophisticated system of subterranean passages cut directly into the rock face.
It is one of the oldest preserved feudal remains in Belgium, with roots dating back to the 8th century Carolingian period.
Bouillon Castle is a multi-level medieval fortress situated on a rocky ridge overlooking the Semois River. The site features three drawbridges, an oubliette, and various vaulted halls originating from the 11th century. It is most famous as the ancestral home of Godfrey of Bouillon, a leader of the First Crusade. The fortification evolved from a wooden structure into a stone castle, later reinforced by Vauban in the 17th century. Visitors can explore a network of stone corridors, stables, and military courtyards that demonstrate centuries of defensive engineering. The site maintains a bird-of-prey sanctuary within the walls, where educational falconry displays are periodically held. The castle currently serves as a museum highlighting medieval weaponry, feudal history, and the crusader movement. Defensive features like arrow slits and murder holes remain preserved throughout the interior passages.
The viewpoint from the top of the 'Tour d'Autriche' provides the best panoramic angle of the castle walls and the surrounding river bend.
Wear sturdy, non-slip footwear to navigate the uneven stone floors and steep ramparts.
Bring a light jacket, as the temperature inside the subterranean vaults is significantly cooler than outside.
Follow the numbered signage carefully, as the layout is labyrinthine and involves multiple levels.
Do not attempt to explore off-path in the basement levels, as these are restricted for safety reasons.
Closed on certain days during the winter months; check local schedules for falconry display availability as these are seasonal.
No climbing on the historical masonry or low defensive walls; keep children supervised near steep drops.
