Extensive modernization of the former Debis building with the Renzo Piano Building Workshop. Kardorff Ingenieure supervised the DGNB gold-certified project from planning to execution for the 22-storey, 106 meter-high office tower, the spectacular atrium with adjacent lobbies and entrances, as well as the new exterior illumination. Already completed in 2015, the Sky Office showroom is located on the eleventh floor.