Columbia subject headings:
Architecture--Italy--Bologna.
Bologna (Italy)--Buildings, structures, etc.
Piazza Nettuno (Bologna, Italy)--Conservation and restoration.
Plazas--Conservation and restoration--Italy--Bologna.
Harvard subject headings:
Princeton subject headings:
Architecture--Italy--Bologna.
Bologna (Italy)--Buildings, structures, etc.
Piazza Nettuno (Bologna, Italy)--Conservation and restoration.
Plazas--Italy--Bologna--Conservation and restoration.