Columbia subject headings:
Harvard subject headings:
City blocks--Germany--Berlin--History.
City planning--Germany--Berlin--History
Plazas--Germany--Berlin--History.
Potsdamer Platz (Berlin, Germany)--History.
Princeton subject headings:
City blocks--Germany--Berlin--History.
City planning--Germany--Berlin--History.
Plazas--Germany--Berlin--History.
Potsdamer Platz (Berlin, Germany)--History.