Columbia subject headings:
Architecture--Austria--Vienna.
Nouvel, Jean, 1945-
Skyscrapers--Austria--Vienna.
Tall buildings--Austria--Vienna.
Vienna (Austria)--Buildings, structures, etc.
Harvard subject headings:
Princeton subject headings:
Architecture--Austria--Vienna--21st century.
Architecture--Competitions--Austria--Vienna.
Hotels--Austria--Vienna--Design and construction--Pictorial works.
Nouvel, Jean, 1945-
Skyscrapers--Austria--Vienna--Pictorial works.
Vienna (Austria)--Buildings, structures, etc.--Pictorial works.