The office building is located in an urban context with significant surroundings, such as the central train station, the Chancellery and the Reichstag. Within the so-called Europacity, the four new volumes become building blocks of the Lehrter Stadtquartier (Lehrter City District). While the outer edges are clean and linear, the facades facing the district's centre are defined with staggered edges, giving each an independent identity as well as a relationship to each other. Catering and retail opportunities populate the ground floor, while a foyer provides access to the upper 7 floors. The tectonic facade is clad in varying depths of light natural stone, adjoined by glazing, strengthening the profundity of the building’s shell. The outer skin of stone is contrasted by the inner courtyard facade of anodised aluminium profiles. Pairs of floors are joined, highlighting the verticality. Roof terraces, loggias and an extensively landscaped inner courtyard become meeting places, providing panoramic views over the administrative district of Berlin on the upper floors. The reinforced concrete structure is stiffened by circulation cores. A construction grid with generous unsupported areas enables a flexible fitout. Low primary energy consumption for heating, cooling, ventilation and lighting is achieved.