Columbia subject headings:
Castles--Germany--Rhineland.
Mönchengladbach (Germany)--Buildings, structures, etc.
Parks--Germany--Rhineland.
Schloss Wickrath (Mönchengladbach, Germany)
Harvard subject headings:
Horse farms--Germany--Mönchengladbach--History.
Landscape architecture--Germany--Mönchengladbach--History.
Schloss Wickrath (Mönchengladbach, Germany)
Princeton subject headings: