The 20-storey office tower, located in Berlin’s new city district “European Quarter” opposite the Central Station, has a glazed double-skin façade. The exterior envelope is characterised by vertically arranged folds, which gradually decrease in depth and articulation from the base floor level towards the top floor. The slender dimensioning of the outer glass skin and its sub-construction gives the façade a light and translucent appearance. The rear ventilated cavity of the double-skin façade has a number of functions. It serves as a buffer for increased sound insulation, protects the motorized solar blinds and allows for natural ventilation of all office spaces in the tower.