Columbia subject headings:
Harvard subject headings:
Chiesa cattedrale e metropolitana di San Pietro (Bologna, Italy)--Exhibitions.
Sculpture, Italian--Italy--Bologna--Exhibitions.
Sculpture, Romanesque--Italy--Bologna--Exhibitions.
Sculpture--Italy--Bologna--Exhibitions.
Princeton subject headings:
Bologna (Italy)--Buildings, structures, etc.--Exhibitions.
Chiesa cattedrale e metropolitana di San Pietro (Bologna, Italy)--Exhibitions.
Christian art and symbolism--Italy--Bologna--Exhibitions.
Church architecture--Italy--Bologna--Exhibitions.