Columbia subject headings:
Architecture--Europe--History--20th century--Designs and plans.
Architecture--Philosophy.
Rationalism.
Harvard subject headings:
Architecture, Modern--20th century--Designs and plans
Architecture, Modern--20th century--Europe--Designs and plans.
Architecture, Modern--Europe--20th century--Designs and plans.
Architecture--Philosophy
Rationalism.
Princeton subject headings:
Architecture, Modern--20th century--Europe.