Castelbuono is a town and commune in the province of Palermo, Sicily (southern Italy). It is especially famous for the castle which its name derives, and around which the city grew up in the 14th century. The construction of the Castle mixes Arab-Norman features with others typical of the castles built during the Hohenstaufen rule of southern Italy: the cube shape recalls Arabic architecture; the square towers, although incorporated into those of the façade, reflect Norman architectural style, as also the battlements; and the round tower recalls aspects of Frederick II's times architecture.