Columbia subject headings:
Harvard subject headings:
Art, Portuguese--19th century.
Art, Spanish--19th century.
Art--Collectors and collecting--Portugal--19th century.
Art--Collectors and collecting--Spain--19th century.
Art--Private collections--Portugal--19th century.
Art--Private collections--Spain--19th century.
Painting, Portuguese--19th century.
Painting, Spanish--19th century.
Painting--Collectors and collecting--Portugal--19th century.
Painting--Collectors and collecting--Spain--19th century.
Painting--Private collections--Portugal--19th century.
Painting--Private collections--Spain--19th century.
Princeton subject headings:
Art--Marketing--History--19th century.
Painting, Spanish.
Painting--Collectors and collecting--Spain--Madrid--History--19th century.