Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--Antiquities--Congresses.
Berlin (Germany)--Civilization--Congresses.
Sociology, Urban--Germany--Berlin--Congresses.
Princeton subject headings:
Arts--Germany--Congresses.
Berlin (Germany)--Intellectual life--History--18th century--Congresses.
Berlin (Germany)--Intellectual life--History--19th century--Congresses.