Columbia subject headings:
Aesthetic movement (Art)
Art nouveau--Europe.
Art, European--19th century.
Art, European--20th century.
Harvard subject headings:
Art nouveau--Europe.
Art, European--20th century
Art, Modern--19th century--Europe.
Princeton subject headings:
Aesthetics movement (British art)
Art nouveau--Europe.
Art, European--20th century.
Art, Modern--19th century--Europe.