It was designed by architect Frank Gehry and engineered by Hans Schober of Schlaich Bergermann & Partner.
Facing the Brandenburg Gate are offices, the headquarters of Deutsche Zentral-Genossenschaftsbank.
On the other side, facing Behrenstraße, are 39 residential apartments.
Between the two is a large atrium, designed to be used as a conference or performance space.
This is covered with a sophisticated glass-grid roof, curved in a complex form typical of Gehry's designs.