Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--History--Congresses.
Berlin (Germany)--Social life and customs--18th century--Congresses.
Berlin (Germany)--Social life and customs--19th century--Congresses.
Königliches Nationaltheater--History--Congresses.
Theater--Germany--Berlin--History--Congresses.
Princeton subject headings:
Berlin (Germany)--History--Congresses.
Berlin (Germany)--Social life and customs--18th century--Congresses.
Berlin (Germany)--Social life and customs--19th century--Congresses.
Königliches Nationaltheater--History--Congresses.
Theater--Germany--Berlin--History--Congresses.