Columbia subject headings:
Architecture--Austria--Vienna--History--19th century.
Architecture--Austria--Vienna--History--20th century.
City planning--Austria--Vienna.
Historic buildings--Austria--Vienna.
Harvard subject headings:
Architectural photography--Austria--Vienna.
Architecture--Austria--Vienna--Pictorial works.
Vienna (Austria)--Buildings, structures, etc.--Pictorial works.
Princeton subject headings:
Architecture--Austria--Vienna--19th century.
Architecture--Austria--Vienna--20th century.
City planning--Austria--Vienna.
Historic buildings--Austria--Vienna.