Columbia subject headings:
Harvard subject headings:
Archaeology, Medieval--Germany--Saxony-Anhalt--Congresses.
Castles--Germany--Saxony-Anhalt--History--To 1500--Congresses.
Palaces--Germany--Saxony-Anhalt--History--To 1500--Congresses.
Saxony-Anhalt (Germany)--Buildings, structures, etc.--Congresses.
Saxony-Anhalt (Germany)--Kings and rulers--Congresses.
Princeton subject headings:
Saxony-Anhalt (Germany)--Historical geography--Congresses.
Saxony-Anhalt (Germany)--History--Congresses.
Saxony-Anhalt (Germany)--Kings and rulers--Congresses.