Welcome to the HZB Photon School 2020, to be held in the Wilhelm-Conrad-Röntgen-Campus (Berlin-Adlershof) from 9th to 20th March, 2020. This school is primarily aimed at master students and early stage researchers in physics, chemistry, materials science, engineering, life or environmental sciences. Students will be introduced to synchrotron and laboratory-based methods that probe the molecular structure, function and dynamics of complex material systems.