Foundation of the office Kleihues + Kleihues Gesellschaft von Architekten mbH consisting of three partners: Prof. Josef Paul Kleihues, Jan Kleihues, Norbert Hensel. After the death of Professor Josef P. Kleihues in August 2004, Kleihues + Kleihues has been continued by Jan Kleihues and Norbert Hensel. Michael Alshut is partner since 2006. Johannes Kressner is partner since 2010. Since 2008 Götz Kern is associate partner.