The Leibniz Institute for Astrophysics Potsdam (AIP) today celebrated the laying of the foundation stone for its extension building at the Babelsberg campus together with Dr Inge Schlotzhauer, Head of Division for Non-University Research, Brandenburg Ministry of Science, Research and Culture and Chair of the Board of Trustees of AIP, the Mayor of the State Capital Potsdam, Mike Schubert, and the President of the Leibniz Association, Prof Matthias Kleiner.