http://www.dpg-physik.de/index.html
The Deutsche Physikalische Gesellschaft e. V. (DPG) is available for everyone: it is a community of students, professors, pupils, teachers, people working in industry or economy, as well as all people who are interested in physics. DPG regards itself as the leading voice for physics and as a platform for people interested in physics. As a non-profit association, it does not pursue any financial interests. In DPG up-and-coming scientists meet Nobel Prize laureates, interested persons meet experts and young and old come together. Together we are united to form the world’s biggest physical society - and you are part of it. DPG cooperates particularly closely with the Wilhelm und Else Heraeus Foundation.