Columbia subject headings:
Breitenburg (Breitenburg, Germany)
Breitenburg (Germany)--Buildings, structures, etc.
Castles--Germany--Breitenburg.
Gardens--Germany--Breitenburg.
Palaces--Germany--Breitenburg.
Harvard subject headings:
Gardens--Germany--Schleswig-Holstein.
Schloss Breitenburg (Germany)
Princeton subject headings:
Breitenburg (Breitenburg, Germany)
Gardens--Germany--Schleswig-Holstein.