School's short summary: 3rd Cosmology School is an annual event aimed at giving an introduction to the current knowledge in cosmology, both in theory and observations. School for the first time will take place in Cracow from 10th to 23rd of July and is intended for undergraduate, MSc and PhD students, as well as young postdoctoral researchers, interested in these fields. The School will include workshops on cosmological simulations, Virtual Observatory tools and SED fitting. More details may be found at: http://cosmoschool2017.oa.uj.edu.pl http://fb.me/3rdCosmologySchool The poster is at: http://cosmoschool2017.oa.uj.edu.pl/poster_cs2017.pdf Best regards, Aleksander Herzig LOC secretary