The ‘Renaissance of the Cities’ increases the density of metropolises worldwide. An ever growing structural density leaves less room for new open spaces in the city. In addition, the urban population’s desire for more qualified open spaces is growing. It is harder to find places for new open spaces and thus it is time to leave the traditional ways of creating and developing new open spaces in order to take the chance to generate them where they were previously impossible.

The aim is to create a ‘plus’ of available open spaces on the same area and to use the opportunities of the z-axis in the urban development to raise once inaccessible space potential. The vertical open space is a symbiosis of built and open space, and therefore the combination of architecture and the objectives of landscape architecture.