Columbia subject headings:
Garden structures--Europe--Designs and plans.
Gardens--England--Designs and plans.
Gardens--France--Designs and plans.
Gardens--Germany--Designs and plans.
Landscape architecture.
Landscape gardening.
Harvard subject headings:
Gardens--England--Designs and plans.
Gardens--France--Designs and plans.
Gardens--Germany--Designs and plans.
Landscape architecture
Landscape gardening.
Princeton subject headings:
Gardens--Design.
Gardens--England.
Gardens--France.
Gardens--Germany.