Columbia subject headings:
Church buildings--Italy--History.
Church history--Middle Ages, 600-1500.
Fortification--Italy--History.
Italy--Church history--476-1400.
Harvard subject headings:
Fortification--Italy--History.
Italy--Church history--Middle Ages, 600-1500.
Princeton subject headings:
Church buildings--Italy--History.
Fortification--Italy--History.
Italy--Church history--476-1400.
Italy--History--476-1492.
Roads--Italy--History.