<Tr> <Th> Built </Th> <Td> 10th century </Td> </Tr> <Tr> <Th> Materials </Th> <Td> stone and masonry </Td> </Tr> <P> Rocca Calascio is a mountaintop fortress or rocca in the Province of L'Aquila in Abruzzo, Italy . </P> <P> At an elevation of 1,460 metres (4,790 ft), 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 . </P>

Santa maria della pietà at rocca calascio abruzzo