Columbia subject headings:
Europe--Kings and rulers--Homes and haunts.
Europe--Kings and rulers.
Palaces--Europe.
Harvard subject headings:
Europe--Kings and rulers--History.
Europe--Kings and rulers--Homes and haunts.
Palaces--Europe
Princeton subject headings:
Europe--Kings and rulers--History.
Europe--Kings and rulers--Homes and haunts.
Palaces--Europe.