Columbia subject headings:
Architecture--Competitions--Spain--Madrid--Pictorial works.
Madrid (Spain)--Buildings, structures, etc.--Pictorial works.
Museo del Prado--Pictorial works.
Harvard subject headings:
Architecture--Competitions--Spain--Madrid.
Art museum architecture--Spain.
Madrid (Spain)--Buildings, structures, etc.
Museo del Prado--Designs and plans.
Museum architecture--Spain--Designs and plans.
Museums--Spain--Madrid--Designs and plans.
Princeton subject headings:
Architecture--Competitions--Spain--Madrid--Exhibitions.
Art museums--Spain--Madrid--Designs and plans--Exhibitions.
Madrid (Spain)--Buildings, structures, etc.--Designs and plans--Exhibitions.
Museo del Prado--Designs and plans--Exhibitions.