The building structure is determined by the space-forming, load-bearing cores of the service rooms. A double-layered façade complements the support structure. The exterior layer, which likewise forms the cantilevered structures of the loggias and the perforated balustrades of the penthouses, is made of poured-in-place concrete. Mineral-based pigments, applied to the concrete with water glass silicate mass, enable a highly matt, pollen-like “powdering” of the building to be achieved. An additional intention is to attain an individualization of the three buildings by varying the coloration, while simultaneously emphasizing their compositional kinship.