Todays human population and its density is the key for maintaining clean nature. The theme of vertical cities was already started by Le Curbusier with the Unite Dehabitation, where the horizontal carpet of the city changes into a vertical street, which enables the relaxation of outdoor green, sunny surfaces. The skeletal construction of empty vertical skyscrapers enables the flexibility of the program according to the user's wishes in a certain period of time.The skyscraper can thus become a vertical place of a diverse program and units, changing over the time.