The Van Leeuwenhoek Laboratory, which houses advanced research facilities, is the nerve centre of activities in the field of nano technology in the Netherlands. The main users, TNO and Delft University of Technology, use the building for research, education and development. Progressive and very complex research places extremely high demands on the building. The underlying principle of the architectonic design was to place humans in a central position. The focus thus lies on communication between the building's users, but also on (visual) communication with the outside world - the atrium plays an important role in this. It forms an interface between the clean rooms (machine) and users. The atrium is suitable for meetings and stimulates an exchange of knowledge.