Columbia subject headings:
Harvard subject headings:
Barcelona (Spain)--Buildings, structures, etc.
Barcelona (Spain)--Social life and customs--20th century.
Palaces--Spain--Barcelona.
Upper class--Spain--Barcelona--History--20th century.
Princeton subject headings:
Barcelona (Spain)--Buildings, structures, etc.
Barcelona (Spain)--Social life and customs--20th century.
Palaces--Spain--Barcelona.
Upper class--Spain--Barcelona--History--20th century.