Columbia subject headings:
Architecture--Europe--History--20th century--Designs and plans--Exhibitions.
Classicism in architecture--Europe--Exhibitions.
Harvard subject headings:
Architecture, Modern--20th century--Europe--Exhibitions.
Architecture--Europe--Exhibitions.
Architecture--Europe--History--20th century--Designs and plans--Exhibitions.
Classicism in architecture--Europe--Exhibitions.
Princeton subject headings:
Architecture, Modern--20th century--Europe--Designs and plans.
Architecture--Europe--Designs and plans.