GianCarlo Ghirardi, long-time consultant of ICTP, will be honoured on the occasion of his 70th birthday with a “double” celebration. On 5 September, ICTP will serve as the initial location for a conference on quantum mechanics. Ghirardi’s life-long achievements will be honoured at this time. The conference will then be moved to Losinj, Croatia, where it will continue from 7 September to 9 September. Among the distinguished guests joining the celebration are ICTP Dirac Medallist Stephen L. Adler (Institute for Advanced Study, Princeton, USA); David Albert (Columbia University, New York, USA); Giovanni Jona-Lasinio (UniversitÃ  â€œLa Sapienzaâ€, Rome, Italy); Roger Penrose (Oxford University, Oxford, UK); and Alberto Rimini (UniversitÃ  di Pavia, Pavia, Italy). In 1986, Ghirardi together with Rimini and Tullio Weber, University of Trieste, developed the GRW model to explain the classical behaviour of large objects.