Columbia subject headings:
Italy--Description and travel.
Italy--Relations--United States.
Travelers--United States.
United States--Relations--Italy.
Harvard subject headings:
Americans--Italy--History--18th century.
Americans--Italy--History--19th century.
Italy--Description and travel.
Italy--Relations--United States.
Travelers, American.
United States--Relations--Italy.
Princeton subject headings:
Italy--Description and travel.
Italy--Relations (general) with the United States.
Travelers, American.
United States--Relations (general) with Italy.