Mirwart Castle, Medieval castle in Saint-Hubert, Belgium

Mirwart Castle is a stone fortress perched on a rocky outcrop above the Lomme Valley, combining towers and architectural elements from multiple construction phases. The structure blends defensive features with residential spaces that today function as a hotel offering dining and event facilities.

A Lotharingian lord built the first fortress here in the early 11th century against the lords of Bouillon and Orchimont. The abbey of Saint-Hubert had it dismantled in 1083, but Prince-Bishop Otbert rebuilt it and granted the estate to Bovon de Waha in 1099. Bought by Jean d'Avesnes in 1293, it passed through sieges in the Franco-Spanish and Franco-Austrian wars before being rebuilt as a residence from the early 18th century.

The castle stands in Mirwart, a village in the Saint-Hubert municipality, whose name and abbey honour Saint Hubert, patron saint of hunters. The seigneurial domain changed hands repeatedly between the prince-bishops of Liège, the counts of Hainaut and Luxembourg, and the dukes of Burgundy. In the 19th century Aimé-Gabriel d'Artigues, founder of the Vonêche crystal works, bought it, and later owners turned it into a country residence.

The castle now operates as a hotel with guest accommodations, dining options, and meeting spaces for visitors. Access is by local road in Luxembourg Province, and parking is available on the grounds.

The castle stands on a rocky spur above the Lomme, a site chosen in the early 11th century by a Lotharingian lord defending himself against the lords of Bouillon and Orchimont. The fortress was dismantled in 1083 by the abbot of Saint-Hubert, then rebuilt from 1099 under Bishop Otbert and granted to Bovon de Waha.