Columbia subject headings:
Castles--Germany--Hesse--History.
Hesse (Germany)--History, Local.
Palaces--Germany--Hesse--History.
Harvard subject headings:
Castles--Germany--Hesse-Kassel (Electorate)--History.
Hesse (Germany)--History, Local.
Palaces--Germany--Hesse-Kassel (Electorate)--History.
Princeton subject headings:
Castles--Germany--Hesse--History.
Hesse (Germany)--Description and travel.
Hesse (Germany)--History.