Columbia subject headings:
Art, Modern--20th century--Exhibitions.
Art, Modern--21st century--Exhibitions.
Art--Germany--Wuppertal--Exhibitions.
Art--Private collections--Exhibitions--Germany--Wuppertal.
Harvard subject headings:
Art, Modern--20th century--Exhibitions
Art, Modern--21st century--Exhibitions
Art--Private collections--Germany--Wuppertal--Exhibitions.
Princeton subject headings: