Columbia subject headings:
Architecture, Romanesque--Conservation and restoration--Italy--Cremona.
Bell towers--Conservation and restoration--Italy--Cremona.
Cremona (Italy)--Buildings, structures, etc.--Conservation and restoration.
Torrazzo (Cremona, Italy)--Conservation and restoration.
Harvard subject headings:
Princeton subject headings:
Architecture, Romanesque--Italy--Cremona--Conservation and restoration.
Bell towers--Italy--Cremona--Conservation and restoration.
Cremona (Italy)--Buildings, structures, etc.--Conservation and restoration.
Torrazzo (Cremona, Italy)--Conservation and restoration.