Next monday March 9 at 16H will be a conference at the main CERN auditorium to celebrate Georges Charpak 85th birthday. Georges Charpak received the Nobel Prize in Physics for his invention and development of a new particle detector, the multiwire proportional chamber. Program of the conference: 16:00 Introduction (15′) by Rolf Heuer, general director of CERN 16:15 Videoconference with Georges Charpak (15′) 16:30 Georges Charpak and the invention and development of particle detectors (1h00′)by Ioannis Giomataris IN2P3 has taken care of the videoconference.