bastion consisted of two separate and completely self-sufficient environments - called "case matte" - almost independent garrisons on their own. Also the aqueduct to the city was deviated so as to supply the fortress first of all, and in case of rebellion block the water supply. Moreover, Escrivà planned a special anti-mine corridor, a kind of empty space between the outer and inner walls which could be walked only by one man at a time (and which can be visited today), aiming at defending the castle in case of explosion in case enemy soldiers excavated tunnels to leave mines at the foundations. A whole hill was leveled down to supply the white stone necessary for the fortress, while the city's bells were melted to make the cannons. In 1798 the citizens fought against the French who had invaded Italy, attacking, in vain, the fortress. From then on, the building was used as a prison. After 1860 it became a military headquarters, and in the Second World War was occupied and damaged by the Germans. Between 1949 and 1951 the castle was restored, and chosen as the seat of the Museo Nazionale d'Abruzzo. References External links Official website Spanish Fortress A portal for L'Aquila Buildings and structures in L'Aquila Castles in Abruzzo Renaissance architecture in Abruzzo