The Haas House is a building in Vienna, Austria, at the Stock-im-Eisen-Platz.
Designed by the Austrian architect Hans Hollein, it is a building in the postmodernist style and was completed in 1990. The building is located at the site of the former flagship department store dating to 1867, destroyed during World War II and rebuilt in 1953. The use of the Haas-Haus is divided between retail and a restaurant. The building is considered controversial owing to its contrast with the adjacent Stephansdom cathedral.
In December 2014, Uniqa Insurance Group sold the building to the Austrian catering company Do & Co, which now uses it as their headquarters.[1]