Columbia subject headings:
Castles--Germany--Düsseldorf.
Düsseldorf (Germany)--Buildings, structures, etc.
Düsseldorfer Schloss (Düsseldorf, Germany)
Harvard subject headings:
Düsseldorf (Germany)--Buildings, structures, etc.
Düsseldorfer Schloss (Düsseldorf, Germany)
Wilhelm, Johann, active 1649-1669--Homes and haunts--Germany--Düsseldorf.
Princeton subject headings: