Columbia subject headings:
Athens (Greece)--History--Congresses.
City-states--Italy--Congresses.
Florence (Italy)--History--To 1421--Congresses.
Rome--History--Congresses.
Venice (Italy)--History--697-1508--Congresses.
Harvard subject headings:
Athens (Greece)--History--Congresses.
Florence (Italy)--History--To 1421--Congresses.
Rome--History--Congresses.
State, The--History--Congresses.
Venice (Italy)--History--697-1508--Congresses.
Princeton subject headings:
Athens (Greece)--History--Congresses.
Florence (Italy)--History--To 1421--Congresses.
Rome (Italy)--History--Congresses.
Venice (Italy)--History--697-1508--Congresses.