Columbia subject headings:
Art--Collectors and collecting--Germany--Berlin.
Berlin (Germany)--Intellectual life--19th century.
Berlin (Germany)--Intellectual life--20th century.
Harvard subject headings:
Art--Collectors and collecting--Germany--Berlin.
Berlin (Germany)--Intellectual life--19th century.
Berlin (Germany)--Intellectual life--20th century
Princeton subject headings:
Art--Collectors and collecting--Germany--Berlin.
Berlin (Germany)--Intellectual life--19th century.
Berlin (Germany)--Intellectual life--20th century.