Columbia subject headings:
Architecture--Spain--Barcelona--History--19th century--Guidebooks.
Architecture--Spain--Barcelona--History--20th century--Guidebooks.
Art nouveau (Architecture)--Spain--Barcelona--Guidebooks.
Barcelona (Spain)--Buildings, structures, etc.--Guidebooks.
Gaudí, Antoni, 1852-1926.
Harvard subject headings:
Architecture--Spain--Barcelona--19th century--Guidebooks.
Architecture--Spain--Barcelona--20th century--Guidebooks.
Art nouveau (Architecture)--Spain--Barcelona--Guidebooks.
Barcelona (Spain)--Buildings, structures, etc.--Guidebooks.
Gaudí, Antoni, 1852-1926
Princeton subject headings: