Columbia subject headings:
Architecture--Germany--History--21st century.
Building, Iron and steel--Germany--History--21st century.
Preis des Deutschen Stahlbaues.
Harvard subject headings:
Architecture--Awards--Germany
Architecture--Germany--History--20th century
Architecture--Germany--History--21st century.
Building, Iron and steel--Germany--History--21st century.
Building, Iron and steel--Germany.
Preis des Deutschen Stahlbaues
Steel houses--Germany.
Princeton subject headings: