Columbia subject headings:
Harvard subject headings:
Bologna (Italy)--History--To 1506
Bologna (Italy)--In literature--Congresses.
Bologna (Italy)--Intellectual life.
Dante Alighieri, 1265-1321--Appreciation--Italy--Bologna--Congresses.
Dante Alighieri, 1265-1321--Criticism and interpretation--Congresses.
Princeton subject headings:
Dante Alighieri, 1265-1321--Appreciation--Italy--Bologna.