The European Tensor Network Seminar Series features BIWEEKLY online talks on tensor networks which provide a new paradigm for describing quantum many body systems. The online talks take place on every other Thursday. Recorded talks are made available on YouTube. The seminar series is organized jointly by Frank Pollmann (Technical University of Munich) Frank Verstraete (Ghent University) and Norbert Schuch (University of Vienna as of October 2020, Max Planck Institute of Quantum Optics prior to that).