Columbia subject headings:
Architectural drawing--Austria--19th century.
Architectural drawing--Austria--20th century.
Art nouveau (Architecture)--Austria--Vienna--Designs and plans.
Wagner, Otto, 1841-1918.
Harvard subject headings:
Architectural drawing--19th century--Austria.
Architectural drawing--20th century--Austria.
Architecture, Modern--19th century--Austria--Vienna--Designs and plans.
Architecture, Modern--20th century--Austria--Vienna--Designs and plans.
Architecture--Austria--Vienna--Designs and plans.
Art nouveau (Architecture)--Austria--Vienna--Designs and plans.
Vienna (Austria)--Buildings, structures, etc.
Wagner, Otto, 1841-1918.
Princeton subject headings:
Architectural drawing--19th century--Austria.
Architectural drawing--20th century--Austria.
Art nouveau (Architecture)--Austria--Vienna--Designs and plans.
Wagner, Otto, 1841-1918.