Two cores and a host of façade columns form the vertical load-bearing elements. A system of prestressed beams placed between the cores makes a column-free floor slab zone possible on five floors that is 27 m in length and 30 m in width. The façade is part of the supporting structure and consists of prefabricated concrete columns and beams. Cracked marble was used as a supplement. The cores are dimensioned such that they can absorb the forces caused by earthquake tremors. The supporting structure thus meets the requirements for Building Class II property located in a seismically very demanding Earthquake Zone 3a.