Columbia subject headings:
Architecture--Austria--Vienna--Exhibitions.
Vienna (Austria)--Buildings, structures, etc.--Exhibitions.
Harvard subject headings:
Architecture, Modern--20th century--Austria--Vienna
Architecture--Austria--History--19th century.
City planning--Austria--Vienna--History.
Vienna (Austria)--Buildings, structures, etc.--History.
Wagner, Otto, 1841-1918
Princeton subject headings:
Architecture, Austrian--Vienna--19th century.
Architecture, Austrian--Vienna--20th century.
Architecture, Austrian--Vienna--Exhibitions.
City planning--Austria--Vienna--History.
Vienna (Austria)--Buildings, structures, etc.--Exhibitions.
Wagner, Otto, 1841-1918.