The XXth iteration of the Urbino Summer School will focus on spacetime and quantum physics (website), held on July 10-13, 2017. feature morning lectures given by Christian Wüthrich (University of Geneva) and Francesca Vidotto (Radboud University); and afternoon seminars given by Carlo Rovelli (CPT, Aix-Marseille Université, Université de Toulon, CNRS), F.A. Muller (Erasmus University Rotterdam) and Tiziana Vistarini (University of Colorado Boulder).