Columbia subject headings:
Architecture--Austria--Vienna--History--19th century.
Architecture--Austria--Vienna--History--20th century.
Architecture--Austria--Vienna.
Vienna (Austria)--Buildings, structures, etc.
Harvard subject headings:
Architects--Austria--Vienna.
Architecture, Modern--20th century--Austria--Vienna.
Architecture--Austria--History--19th century.
Architecture--Austria--Vienna
Architecture--Austria--Vienna--History.
Vienna (Austria)--Buildings, structures, etc.
Princeton subject headings: