Columbia subject headings:
Art galleries, Commercial--Europe.
Art museums--Europe.
Art, European--20th century.
Art--Collectors and collecting--Europe.
Conceptual art--Europe--Exhibitions.
Conceptual art--Europe.
Harvard subject headings:
Art galleries, Commercial--Europe.
Art museums--Europe.
Art, European--20th century
Art--Collectors and collecting--Europe.
Conceptual art--Europe--Exhibitions.
Conceptual art--Europe.
Princeton subject headings:
Art galleries, Commercial--Europe.
Art museums--Europe.
Art, European--20th century.
Art--Collectors and collecting--Europe.
Conceptual art--Europe--Exhibitions.
Conceptual art--Europe.