Castel del Monte (Italian for "Castle of the Mountain"; Barese: Castídde d'u Monte) is a 13th-century citadel and castle situated in Andria in the Apulia region of southeast Italy. It stands on a promontory, where it was constructed during the 1240s by the Emperor Frederick II, who had inherited the lands from his mother Constance of Sicily. In the 18th century, the castle's interior marbles and remaining furnishings were removed.