Columbia subject headings:
Art museum architecture--Spain--Madrid.
Madrid (Spain)--Buildings, structures, etc.
Museo del Prado.
Harvard subject headings:
Madrid (Spain)--Buildings, structures, etc.
Museo del Prado--History.
Museums--Spain--Madrid--History.
Princeton subject headings:
Madrid (Spain)--Buildings, structures, etc.
Museo del Prado--History.
Museums--Spain--Madrid--History.