Columbia subject headings:
Architecture--Germany--North Rhine-Westphalia--History--20th century.
Architecture--Germany--North Rhine-Westphalia--History--21st century.
College buildings--Germany--North Rhine-Westphalia.
Harvard subject headings:
Architecture--Germany--North Rhine-Westphalia--History.
College buildings--Germany--North Rhine-Westphalia.
School buildings--Germany--Nordrhein.
School buildings--Germany--Westphalia.
Princeton subject headings: