Columbia subject headings:
Architectural design--Europe--History--20th century.
Architectural design--Europe--History--21st century.
Architecture--Competitions--Europe.
City planning--Competitions--Europe.
Europan (Organization)
Harvard subject headings:
City planning--Europe
Europan (Organization)
Sustainable architecture--Europe.
Princeton subject headings:
City planning--Europe.
Europan (Organization)
Sustainable architecture--Europe.