Columbia subject headings:
Graubünden (Switzerland)--History, Local.
Liechtenstein--History, Local.
Raetia--History, Local.
Harvard subject headings:
Graubünden (Switzerland)--History, Local.
Liechtenstein--History, Local.
Raetia--History, Local.
Princeton subject headings:
Castles--Liechtenstein--History.
Castles--Switzerland--Graubünden--History.
Graubünden (Switzerland)--History.
Liechtenstein--History.