Columbia subject headings:
Architecture--Spain--Barcelona--History--20th century--Exhibitions.
Gaudí, Antoni, 1852-1926--Exhibitions.
Harvard subject headings:
Architects--Spain--Barcelona.
Architecture, Modern--20th century--Spain--Barcelona.
Architecture, Modern--21st century
Gaudí, Antoni, 1852-1926--Exhibitions.
Princeton subject headings:
Architecture, Modern--20th century--Spain--Barcelona--Exhibitions.
Gaudí, Antoni, 1852-1926--Exhibitions.