The plan form is triangular, comprising three ‘petals’, the office floors and a ‘stem’ formed by a full-height central atrium. The tower has a distinctive presence on the Frankfurt skyline but it is also anchored into the lower-scale city fabric. It rises from the centre of a city block alongside the original Commerzbank building.

Four-storey gardens are set at different levels on each of the three sides of the tower, forming a spiral of gardens around the building.  The gardens become the visual and social focus for village-like clusters of offices. They play an ecological role, bringing daylight and fresh air into the central atrium, which acts as a natural ventilation chimney up the building for the inward-facing offices.  Depending on their orientation, planting is from one of three regions: North America, Asia or the Mediterranean.

Energy consumption was one half that of conventional office towers at the time.  Every office was daylit and had openable windows.  The cladding is based on a double skin technology.