We are pleased to have won a new project since we were arwarded the first prize for our design of the new building for the Kiepenheuer Institute for Solar Physics (KIS) in Freiburg. The adequate approach to the urban planning situation defines the framework of the conceptual design and the basic structural idea of the new building. To assert itself as the first building block in the fourth construction phase, the design draws on a compact cubature. The new building is situated at the corner of the plot and allows the greatest possible flexibility and creative freedom for further development. Inside the building, the atrium is the centrepiece that connects the different areas of the institute through a void.