Columbia subject headings:
Bologna (Italy)--Civilization--Congresses.
Bologna (Italy)--History--Papal rule, 1506-1797--Congresses.
Bologna (Italy)--History--To 1506--Congresses.
Harvard subject headings:
Bologna (Italy)--Civilization--Congresses.
Bologna (Italy)--History--Congresses.
Bologna (Italy)--History--Papal rule, 1506-1797--Congresses.
Bologna (Italy)--History--To 1506--Congresses.
Renaissance--Italy--Bologna--Congresses.
Princeton subject headings:
Bologna (Italy)--Civilization--Congresses.
Bologna (Italy)--History--Papal rule, 1506-1797--Congresses.
Bologna (Italy)--History--To 1506--Congresses.