Columbia subject headings:
Harvard subject headings:
Architecture--Austria--Vienna
Austria--Austria--Vienna--Kings and rulers--Homes and haunts.
Palaces--Austria--Vienna--History.
Palaces--Remodeling for other use--Austria--Vienna.
Public buildings--Austria--Vienna.
Vienna (Austria)--Buildings, structures, etc.
Princeton subject headings:
Palaces--Austria--Vienna.
Public buildings--Austria--Vienna.