2018 marks the 50th anniversary of the creation of the European Physical Society (EPS). In this context, and following the success of two previous meetings in Cambridge (United Kingdom) and Pöllau (Austria), the organisers are happy to announce the Third International Conference on the History of Physics, under the auspices of the EPS, which will take place in Donostia/San Sebastian (Spain) in October 17-21, 2018.