Columbia subject headings:
Harvard subject headings:
Archaeology, Medieval--Germany--Saxony-Anhalt--Congresses.
Castles--Germany--Saxony-Anhalt--History--Congresses.
Nobility--Germany--Saxony-Anhalt--History--Congresses.
Palaces--Germany--Saxony-Anhalt--History--Congresses.
Saxony-Anhalt (Germany)--Buildings, structures, etc.--Congresses.
Saxony-Anhalt (Germany)--Kings and rulers--Congresses.
Princeton subject headings:
Altmark (Germany)--History.
Kings and rulers--Homes and haunts.
Saxony-Anhalt (Germany)--History.