Columbia subject headings:
Harvard subject headings:
Austria--Kings and rulers--History.
Castles--Austria--History.
Castles--Hungary--History.
Habsburg, House of--Homes and haunts.
Princeton subject headings:
Austria--Kings and rulers--Biography.
Castles--Austria--Pictorial works.
Castles--Hungary--Pictorial works.
Habsburg, House of--Homes and haunts--Austria.
Habsburg, House of--Homes and haunts--Hungary.