Columbia subject headings:
Art, European--19th century--Exhibitions.
Art, European--20th century--Exhibitions.
Art, European--Exhibitions.
Von der Heydt-Museum--Exhibitions.
Harvard subject headings:
Art, European--19th century--Exhibitions
Art, European--20th century--Exhibitions
Heydt, Eduard von der, 1882-1964.
Heydt, Karl von der, 1858-1922.
Von der Heydt-Museum--Exhibitions.
Princeton subject headings:
Art, European--19th century--Exhibitions.
Art, European--20th century--Exhibitions.
Von der Heydt-Museum--Exhibitions.