Columbia subject headings:
Gardens--Europe--History--19th century--Congresses.
Landscape architects--Germany--Biography--Congresses.
Landscape architecture--Europe--History--19th century--Congresses.
Lenné, Peter Joseph, 1789-1866--Congresses.
Parks--Europe--History--19th century--Congresses.
Harvard subject headings:
Gardens--Europe--History--19th century--Congresses.
Landscape architects--Germany--Biography--Congresses.
Landscape architecture--Europe--History--19th century--Congresses.
Lenné, Peter Joseph, 1789-1866--Congresses.
Parks--Europe--History--19th century--Congresses.
Princeton subject headings:
Gardens--Germany.
Lenné, Peter Joseph, 1789-1866.
Parks--Germany.