Columbia subject headings:
Architecture, Baroque--Italy--Bologna.
Architecture, Renaissance--Italy--Bologna.
Palaces--Italy--Bologna.
Harvard subject headings:
Architecture, Baroque--Italy--Bologna.
Architecture, Renaissance--Italy--Bologna.
Bologna (Italy)--Buildings, structures, etc.
Palaces--Italy--Bologna.
Princeton subject headings:
Architecture, Baroque--Italy--Bologna.
Architecture, Renaissance--Italy--Bologna.
Bologna (Italy)--Buildings, structures, etc.
Palaces--Italy--Bologna.