Columbia subject headings:
Architecture--Austria--Vienna--History--21st century.
City planning--Austria--Vienna.
Urban renewal--Austria--Vienna.
Vienna (Austria)--Buildings, structures, etc.
Viertel Zwei (Vienna, Austria)--Pictorial works.
Harvard subject headings:
Architecture--Austria--Vienna--21st century.
Architecture--Austria--Vienna--History--21st century.
City planning--Austria--Vienna
Urban renewal--Austria--Vienna.
Vienna (Austria)--Buildings, structures, etc.
Vienna (Austria)--Buildings, structures, etc.--Pictorial works.
Viertel Zwei (Vienna, Austria)--Pictorial works.
Princeton subject headings: