Since its move from Berlin to Hamburg in 1956, the Max Planck Institute for Comparative and International Private Law has been centrally located between the western bank of the Alster in the east, the university in the west and the exhibition center with the Dammtor station in front of it in the south.
The main challenge in planning the third expansion at this site was to accommodate approx. 3,600 sqm gross floor area (of which approx. 2,000 sqm above ground level) on the already densely built-up property.
The new building fits almost naturally into the already existing circle around the inner courtyard, which until then had formed the three-storey building dating back to the 1950s, with a southern low-rise building and the "tower" in the north with eastern low-rise buildings from the 1970s ,
The demolition of the southern low-rise building and a building corner with staircase of the "old building" created the necessary space for the 4-storey new building which rounds off the ensemble to the south. The compact, new building partially takes up the contours of the previous one-storey building. The resulting building mass, rejuvenating to the middle ground as well as to the rear area, gives the extension its unmistakable exciting figure. An undercut in the area of the new forecourt additionally gives the building a certain lightness.
Through a uniform basic concept and the related materials, the different parts of the building combine and still remain different and independent.
The extension building with a new main entrance, foyer, main staircase, library and seminar room sets new trends, opening up the existing site without dominating it. At the same time, the ensemble of the institute in the architectural-urban planning area is represented more impressively by the new building.