Columbia subject headings:
Harvard subject headings:
Architecture, Romanesque--Spain--Madrid.
Art, Romanesque--Spain--Madrid.
Catholic church buildings--Spain--Madrid.
Madrid (Spain)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Romanesque--Spain--Madrid.
Art, Romanesque--Spain--Madrid.
Catholic church buildings--Spain--Madrid.
Madrid (Spain)--Buildings, structures, etc.