The Scientific Legacy of Dick Dalitz On February 11 2016, the weekly seminar of the Particle Theory Group in the Rudolf Peierls Centre for Theoretical Physics was devoted to a celebration of the work of Richard H Dalitz FRS (1925-2006) who founded the group in 1963. His distinguished ex-students Frank Close (DPhil 1969) and Sir Christopher Llewellyn-Smith FRS (DPhil 1971) gave accounts of the seminal contributions Dick made to our understanding of the fundamental structure of matter. The talks were enlivened with personal reminiscences and are being made available on-line especially for the many alumni who could not come to the event. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/