Rocca Calascio is the highest fortress in the Apennines. Built of stone and masonry exclusively for military purposes and intended only to accommodate troops and never as residence for nobles, the fortress overlooks the Plain of Navelli at one of the highest points in the ancient Barony of Carapelle. Construction of the fortress started in the tenth century as a single watchtower. A walled courtyard with four cylindrical towers at the corners around a taller inner tower was added in the thirteenth century. The lower half of the fortress is built with distinctively larger stones than its upper half. It is believed that this feature was to make its base impenetrable to invaders. It was the set of one of the most famous movie of the film’s history, “The Name of the Rose”.