Columbia subject headings:
Harvard subject headings:
Catholic Church--Foreign relations--Italy.
Church history--Middle Ages, 600-1500
Italy--Foreign relations--476-1268.
Italy--Foreign relations--Catholic Church.
Italy--History--476-774.
Italy--Relations--Catholic Church.
Lombards--Italy--History.
Papacy--History--To 1309
Princeton subject headings:
Italy--History--476-774.
Lombards--Italy.
Papacy--History--To 1309.