The new headquarters, with a usable area of 33,000 m², was built on the existing site in the direct vicinity of a public park. The main components of the design consist of a transparent two-storey congress building, which crosses at right angles with the new office tower, which stands on two "feet" like a bridge resting on the lower building with two underground parking levels. In addition, a terrace on the roof of the Congress building offers a view of the adjoining park landscape. Key characteristic features of the new tower are its remarkable twist with a double-curved façade consisting of triangular window elements and white exposed concrete.
The primary task was to reinforce the 14-storey building, considering the dominant oblique position resulting from its rotation. Another challenge was the tower's dissolution on the lower floors: The building functions as a bridge spanning the transversely arranged congress building.
The supporting structure essentially consists of the access cores with the two-storey bridge girders, the ceiling slabs and the external perforated façade. The geometry of the façade nodes was optimised in a computer-aided algorithm process.
The Congress building, with its auditorium, exhibition hall and congress rooms located under the office tower, has an open floor plan with large spans.
New FairKarlsruhe, Germany
Foundation Seydoux-PathéParis, France
European Central Bank – ECBFrankfurt, Germany