Altes Rathaus, Cultural center in Babelsberg, Potsdam, Germany.

The Kulturhaus Babelsberg occupies the former Rathaus Nowawes at Karl-Liebknecht-Straße 135, on the corner of Rudolf-Breitscheid-Straße. The three-storey brick building was designed by Otto Kerwien in 1898–1899 in the manner of medieval brick architecture. Its decorated show facades, with glazed bricks and sculpted sandstone elements, are topped by an octagonal corner tower that dominates the crossroads.

The community council of Nowawes bought the corner plot at Priesterstraße/Lindenstraße, formerly the Göhlsdorf inn, for a new municipal building. Architect Otto Kerwien received the commission in 1898, the foundation stone was laid in December 1898 with a time capsule holding a history of the Nowawes weavers' colony, and the house opened on 19 January 1900. In 1938 Nowawes became Babelsberg, and a year later the town was absorbed into Potsdam, ending the building's role as an administrative seat.

Since 1956 the former town hall has served as a club and culture house; in May 1974 it was named after Herbert Ritter, a communist youth murdered by a National Socialist in 1931. A bid to name it after Bertolt Brecht failed because the Brecht heirs refused consent. Today the AWO district association Potsdam runs it, and concerts, puppet theatre, improvisation theatre and open-air festivals take place here.

The Kulturhaus Babelsberg stands at the corner of Karl-Liebknecht-Straße and Rudolf-Breitscheid-Straße, a short walk from Babelsberg station. Renovation from April 2010 to January 2011 added a lift and step-free access, so all floors can be reached without stairs. Rooms can be rented by clubs, initiative groups, families and individuals for self-organised events.

In the 1944 film Die Feuerzangenbowle, the tower of the then Rathaus Babelsberg appears in a scene where Professor Crey checks the time against the tower clock, at minute 83. The building had already lost its administrative role in 1939, when Babelsberg was incorporated into Potsdam.