Columbia subject headings:
Ambassadors.
Rome. Albergo degli ambasciatori.
Harvard subject headings:
Albergo degli ambasciatori (Rome, Italy)
Ambassadors--Italy.
Diplomatic and consular service, Italian--Italy--Rome--History.
Palaces--Italy--Rome
Princeton subject headings:
Ambassadors--Italy--History.
Ambassadors--Papal States--History.
Embassy buildings--Italy--Rome.
Italy--Foreign relations.
Papal States--Foreign relations.