Wien Museum. Uhrenmuseum, Clock museum in central Vienna, Austria.

The Wien Museum Uhrenmuseum occupies the Palais Obizzi, also called Harfenhaus, one of Vienna's oldest houses, owned by the city since 1901. On three floors in 19 rooms it shows around 700 clocks tracing clockmaking since the 15th century, among them a tower clock from the first half of the 15th century and the tower clockwork Joachim Oberkircher built for Stephansdom in 1699. Another 3000 to 4000 clocks are kept in storage.

Vienna's city council voted on 4 May 1917 to found the museum after teacher Rudolf Kaftan offered his 10,000-piece clock collection; donors including Karl von Škoda and Bernhard Wetzler funded the purchase of Marie von Ebner-Eschenbach's clocks. It opened on 30 May 1921 in Kaftan's third-floor flat in the Palais Obizzi, a city property since 1901, with Kaftan as director until his death in 1961. During the Nazi era the museum acquired clocks from persecuted Jewish owners, among them 70 pieces bought from the liquidated stock of master watchmaker Alexander Grosz. Today it is a branch of the Wien Museum.

The collection spans from small portable timepieces to large church clocks, reflecting the craftsmanship of European horologists across different periods. These works show how important timekeeping became in European society and culture.

Access to all three floors relies on stairs, so comfortable shoes are recommended as elevators are not available throughout the building. Visitors should plan for adequate time to view the large number of objects at a relaxed pace, as rushing through would not be practical.

Among the exhibits is a cannon clock: the cannon itself forms the case, while the movement sits inside one of its wheels. The museum also keeps a stand clock from the villa of Katharina Schratt, actress and confidante of Emperor Franz Joseph I, in Bad Ischl. A further 3,000 to 4,000 clocks remain in storage.