Ernst Ulrich Tillmanns is one of five architects to give lectures in the Orange Hall at the Delft University of Technology on 23 September about their different paths to the successful firm of architects. 4a Architekten was founded in Stuttgart in 1990 by Matthias Burkart, Eberhard Pritzer (partner until 2001), Alexander von Salmuth and Ernst Ulrich Tillmanns. The company realizes international projects and now employs around 50 people and has another office in Moscow.