Château de Castelnaud-la-Chapelle

The Château de Castelnaud is a medieval fortress in the commune of Castelnaud-la-Chapelle, overlooking the river Dordogne in Périgord, southern France.

The oldest documents mentioning it date to the 13th century, when it figured in the Albigensian Crusade; its Cathar castellan was Bernard de Casnac.

Simon de Montfort took the castle and installed a garrison; when it was retaken by Bernard, he hanged them all.

During the Hundred Years' War, the castellans of Castelnaud owed their allegiance to the Plantagenets, the sieurs de Beynac across the river, to the king of France.

Today the restored castle, a private property open to the public, houses a museum of medieval warfare, featuring reconstructions of siege engines, mangonneaux, and trebuchets.