Waroux Castle is a castle in Belgium, located in Alleur in the municipality of Ans, province of Liège, and the old region of Hesbaye.Waroux was one of the rare circular castles in Belgium. The keep still remains of the medieval structure. For centuries it was the property of the de Waroux family until 1525, when it died by marriage. In 1696 it was apparently acquired by the De Clerkx de Waroux family, who remained the owners until 1925.