Columbia subject headings:
Harvard subject headings:
Bologna (Italy)--Buildings, structures, etc.--Congresses.
Bologna (Italy)--Religious life and customs--Congresses.
Church architecture--Italy--Bologna--Congresses.
Santuario della Madonna di S. Luca (Bologna, Italy)--Congresses.
Princeton subject headings:
Bologna (Italy)--Buildings, structures, etc.--Congresses.
Bologna (Italy)--Religious life and customs--Congresses.
Santuario della Madonna di S. Luca (Bologna, Italy)--Congresses.