Columbia subject headings:
Harvard subject headings:
Architecture, Domestic--Italy--Rome
Embassy buildings--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Villa Spada al Gianicolo (Rome, Italy)
Princeton subject headings:
Architecture, Domestic--Italy--Rome--c 17th century.
Embassy buildings--Italy--Rome.
Ireland. Embassy (Vatican City)--Buildings.
Rome (Italy)--Buildings, structures, etc.