Columbia subject headings:
Art museums--Spain--Madrid--History--Exhibitions.
Museo del Prado--History--Exhibitions.
Painting--Spain--Madrid--Exhibitions.
Harvard subject headings:
Art museums--Spain--Madrid--History.
Museo del Prado--History.
Princeton subject headings:
Art museums--Spain--Madrid--History--Exhibitions.
Museo del Prado--History--Exhibitions.
Painting--Spain--Madrid--Exhibitions.