Columbia subject headings:
Castles--Germany--Schleswig-Holstein.
Manors--Germany--Schleswig-Holstein.
Palaces--Germany--Schleswig-Holstein.
Schleswig-Holstein (Germany)--Buildings, structures, etc.
Schleswig-Holstein (Germany)--History.
Harvard subject headings:
Castles--Germany--Schleswig-Holstein.
Manors--Germany--Schleswig-Holstein.
Schleswig-Holstein (Germany)--History.
Princeton subject headings:
Castles--Germany (West)--Schleswig-Holstein.
Manors--Germany (West)--Schleswig-Holstein.
Schleswig-Holstein (Germany)--History.