Columbia subject headings:
Art museums--Spain--History--19th century--Congresses.
Art--Collectors and collecting--Portugal--History--19th century--Congresses.
Art--Collectors and collecting--Spain--History--19th century--Congresses.
Court artists--Portugal--History--19th century--Congresses.
Court artists--Spain--History--19th century--Congresses.
Harvard subject headings:
Art museums--Spain--History--19th century.
Art--Collectors and collecting--Portugal--History--19th century.
Art--Collectors and collecting--Spain--History--19th century.
Court artists--Spain--History.
Princeton subject headings:
Art museums--Spain--History--19th century--Congresses.
Art--Collectors and collecting--Portugal--History--19th century--Congresses.
Art--Collectors and collecting--Spain--History--19th century--Congresses.
Court artists--Portugal--History--19th century--Congresses.
Court artists--Spain--History--19th century--Congresses.