Columbia subject headings:
Architecture--Spain--Barcelona--History.
Barcelona (Spain)--Buildings, structures, etc.
Return migration--Spain--Barcelona--History.
Harvard subject headings:
Architecture--Spain--Barcelona--History.
Barcelona (Spain)--Buildings, structures, etc.
Return migration--Spain--Barcelona--History.
Princeton subject headings:
Architecture--Spain--Barcelona--History.
Barcelona (Spain)--Buildings, structures, etc.
Return migration--Spain--Barcelona--History.