Funkhaus Grünau, Broadcasting complex in Grünau, Berlin, Germany

Funkhaus Grünau is a four-story, seven-bay brick building with a flat roof, built in 1929/1930 in the Nachexpressionismus style to plans by Otto Zbrzezny for Michelhaus AG and Danatbank. Its street facade has a semicircular two-story portal with balcony, and the brickwork between the window rows is knobbed. The upper story is wood-clad and ringed by a gallery; projecting stair towers with ceramic-tiled edges stand at the narrow ends, and the water side steps down in terraces. The ground floor held the boat hall, the first floor a large festival hall, and the third floor a gymnasium.

The building was constructed between 1929 and 1930 as a sports facility for Danatbank, initially serving as a recreation and athletic center. After World War II, Soviet administration took over in 1947 and operated it as a broadcasting center until 1956.

The building's name comes from its years as a broadcast house: from 1947 the Soviet Military Administration used the former boat houses at Regattastraße 277 and 267 for radio production. From 1950 a radio school trained journalists here, and from 1959 the Central Training Centre for Broadcasting Technology of the Deutsche Post operated on the site.

The site sits along the Dahme River and is reachable by paths that offer views of the building's exterior. The interior is currently closed to visitors, and the building requires extensive renovation, so you can only explore the outside and enjoy views from the riverbank.

The building housed the covert broadcaster Deutscher Freiheitssender 904 from September 1956 to 1959, chosen because it stood far from the main GDR radio headquarters in Nalepastraße. From 1 October 1960 the neighbouring house at Regattastraße 267 concealed the Deutscher Soldatensender 935, camouflaged by the rowing section of the army sports club ASK; it broadcast until 30 June 1972.