Saturday 8 October more than 100 former Leiden physics students, PhD students, postdocs and staff met to renew acquaintances and learn about latest developments. There was ample time for looking back with shared memories over lunch and drinks, while talks by Sense Jan van der Molen, Koenraad Schalm, Diego Garlaschelli and Tjerk Oosterkamp showed new developments and intriguing open problems for research. The question most asked: when will the next alumni symposium take place? See link for photos