Columbia subject headings:
Art galleries, Commercial--France--Paris.
Art galleries, Commercial--Germany--Berlin.
Artist-run galleries--France--Paris.
Artist-run galleries--Germany--Berlin.
Harvard subject headings:
Art galleries, Commercial--France--Paris--History--20th century.
Art galleries, Commercial--Germany--Berlin--History--20th century.
Art museums--France--Paris--History--20th century.
Art museums--Germany--Berlin--History--20th century.
Princeton subject headings: