Columbia subject headings:
Architecture, Domestic--Italy--Rome.
Palaces--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Domestic--Italy--Rome
Courtyards--Italy--Rome.
Palaces--Italy--Rome
Rome (Italy)--History.
Princeton subject headings:
Architecture, Domestic--Italy--Rome.
Courtyards--Italy--Rome.
Rome (Italy)--History.