Columbia subject headings:
Castles--Germany--North Rhine-Westphalia.
Clemens August, Archbishop and Elector of Cologne, 1700-1761.
North Rhine-Westphalia (Germany)--History, Local.
Harvard subject headings:
Castles--Germany--North Rhine-Westphalia.
Clemens August, Archbishop and Elector of Cologne, 1700-1761
North Rhine-Westphalia (Germany)--History, Local.
Schlösser--Germany--18th century.
Princeton subject headings:
Castles--Germany--North Rhine-Westphalia.
Clemens August, Archbishop and Elector of Cologne, 1700-1761.
North Rhine-Westphalia (Germany)--History, Local.