Columbia subject headings:
Architecture, Renaissance--Italy--Rome.
Architecture--Italy--Rome.
Mansions--Italy--Rome.
Palaces--Italy--Rome.
Rome (Italy)--Description and travel.
Harvard subject headings:
Architecture--Italy--Rome
Palaces--Italy--Rome
Rome (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Italy--Rome.
Palaces--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.