Columbia subject headings:
Harvard subject headings:
Architecture--Spain--Barcelona--19th century--Guidebooks.
Architecture--Spain--Barcelona--20th century--Guidebooks.
Barcelona (Spain)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Modern movement (Architecture)--Spain--Barcelona.
Palaces--Spain--Barcelona--History--19th century.
Palaces--Spain--Barcelona--History--20th century.