Columbia subject headings:
Architecture--Austria--Vienna--History--19th century--Designs and plans--Exhibitions.
Buildings--Austria--Vienna--Exhibitions.
Ferstel, Heinrich von, 1828-1883--Exhibitions.
Harvard subject headings:
Architecture, Modern--19th century--Austria--Vienna--Designs and plans--Exhibitions.
Architecture--Austria--Vienna--History--Designs and plans--Exhibitions.
Ferstel, Heinrich von, 1828-1883--Exhibitions.
Vienna (Austria)--Buildings, structures, etc.--Exhibitions.
Princeton subject headings: