A cubic steel reinforced concrete structure is roughing up the urbanistic appearance in Berlin-Mitte and providing a topic for conversation. Rightfully. Form and colour are a prominent highlight in the midst of historical urban development. The Linienstrasse 40 project (L 40) came into being within the context of a program initiated by the Association for the Fostering of Art and Culture at Rosa Luxembourg Platz in cooperation with the artist Cosima von Bonin.