Columbia subject headings:
Art museums--Spain--Madrid--History.
Art--Spain--Madrid.
Museo Nacional de Arte Moderno (Spain)--History.
Museo del Prado--History.
Harvard subject headings:
Art museums--Spain--Madrid--History.
Art--Spain--Madrid.
Museo Nacional de Arte Moderno (Spain)--History.
Museo del Prado--History.
Princeton subject headings:
Art museums--Spain--Madrid--History.
Art--Spain--Madrid.
Museo Nacional de Arte Moderno (Spain)--History.
Museo del Prado--History.