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