The Stream Tower (German: Bachturm) is a high-rise office building in the Friedrichshain district of Berlin, Germany.

[3] Construction was completed at the beginning of 2022 and handed over by the client, the Austrian company Signa Holding, to the main tenant Zalando.

[6] The concept which stood behind the creation of the builsing involved organizing the sizeable building with a winding concrete strip structure that folds upwards, creating visual distortion on the vast facade areas and contributing to the urban aspect.

The dynamic folding design provides varying perspectives of the building from various angles, enhancing the liveliness of the urban area.

[7] The building's interior consists of exposed concrete and wood, creating a sturdy foundation for potential future uses.