Columbia subject headings:
Architecture, Italian.
Gardens--Italy--Rome.
Landscape architecture--Italy--Rome.
Palaces--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Rome (Italy)--Description and travel.
Harvard subject headings:
Gardens--Italy--Rome.
Palaces--Italy--Rome
Rome (Italy)--Buildings, structures, etc.
Princeton subject headings:
Gardens--Italy--Rome.
Landscape architecture--Italy--Rome.
Palaces--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Rome (Italy)--Description and travel.