Columbia subject headings:
Artists' gardens--Europe--History--19th century--Congresses.
Gardens, European--History--19th century--Congresses.
Historic gardens--Europe--Congresses.
Harvard subject headings:
Artists' gardens--Europe--History--19th century--Congresses.
Gardens, European--History--19th century--Congresses.
Princeton subject headings:
Artists' gardens--Europe--History--19th century--Congresses.
Gardens, European--History--19th century--Congresses.