Columbia subject headings:
Painting, Italian--17th century.
Painting, Italian--18th century.
Painting--Collectors and collecting--Italy--Ferrara.
Ruffo, Tommaso, 1663-1753--Art collections.
Harvard subject headings:
Art--Private collections--Italy--Ferrara--Congresses.
Art--Private collections--Italy--Rome--Congresses.
Ruffo, Tommaso, 1663-1753--Art collections--Congresses.
Princeton subject headings:
Painting, Italian--17th century.
Painting, Italian--18th century.
Painting--Collectors and collecting--Italy--Ferrara.
Ruffo, Tommaso, 1663-1753--Art collections.