Looking on the site in a bigger context you see that it is located at the end of a green stream coming from the north. From the urban planning point of view the green stream should be continued. So a building here is a conflict. On the other hand it can be the mediator between urbanity and nature. To achieve this, the façade in town direction is designed as a green roof - nature. On the contrary in river direction it is complete glass façade - urbanity.

The main elements on the building site are the trees. The building that should merge together with the nature has to be oriented on the trees. People walking on the site are guide by the tree trunks. Therefore also the new sidewalk, which is lifted 1.50 m above site level and forms so the base, is oriented on the course of the tree trunks. To introduce a lifted base is not only a design decision. Primarily it is a flood protection.

The building himself is of course higher than the viewer on the site. Therefore not the tree trunks but the tree crones are essential for the facade. The curved form merges with the trees. Only two things in the line of trees form an exception. There is a bigger gap between two trees, which gives us the possibility of a special element. The tree beside the gap is bigger than the others and “dominates” them. This tree should be noticed in his whole magnificence and his whole height. For this reason a fugue is introduced into the green roof.

A form comes into being. In the south the curve guides the people to the nature. The striking element is oriented to the nature. The glass fugue opens the view on the big tree to the nature. The north side can be noticed from the Mannheimer Street because of its form and also guides people to the nature.