Castle of Rocca Calascio

The Castle of Rocca Calascio is a mountaintop fortress or rocca in the municipality of Calascio, in the Province of L'Aquila, Abruzzo, Italy.

At an elevation of around 1,460 metres, the castle 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 a 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.