Columbia subject headings:
Schauenburg (Germany)--History--Congresses.
Schaumburg family--Congresses.
Harvard subject headings:
Schaumburg (Germany : Landkreis)--History--Congresses.
Schaumburg family--History--Congresses.
Princeton subject headings:
Schaumburg (Germany : Landkreis)--History--Congresses.
Schaumburg family--History--Congresses.