Columbia subject headings:
Cities and towns--Italy--History--To 1500--Congresses.
Italy--History--476-1492--Congresses.
Harvard subject headings:
Cities and towns--Italy--History--To 1500--Congresses.
Italy--History--476-1492--Congresses.
Princeton subject headings:
Cities and towns--Italy--History--To 1500--Congresses.
Italy--History--476-1492--Congresses.