Columbia subject headings:
Architecture--Spain--Exhibitions.
Architecture--Spain--History--18th century--Exhibitions.
Architecture--Spain--History--19th century--Exhibitions.
Theaters--Spain--Exhibitions.
Harvard subject headings:
Architecture--Spain--17th-18th centuries--Exhibitions.
Architecture--Spain--19th century--Exhibitions.
Architecture--Spain--History--Exhibitions.
Theaters--Spain--Exhibitions.
Princeton subject headings: