Columbia subject headings:
Harvard subject headings:
Italy--Foreign relations--1268-1492.
Italy--Foreign relations--476-1268.
Italy--History--476-1492.
Mediterranean Region--Civilization--History--Middle Ages, 500-1500.
Princeton subject headings:
Italy--Foreign relations--1268-1492.
Italy--Foreign relations--476-1268.
Italy--History--476-1492.
Mediterranean Region--Civilization--History--Middle Ages, 500-1500.