The International Summer School 2021 (RIFCH, IAPW) started on 28. 6. 2021 and, in addition to the introductory lectures, the participants managed to settle in the laboratories and visit Třeboň and the Algatech Center. If you want to know how the whole summer school program is going, with participants from Germany, Austria, Spain, Norway, or Croatia, keep an eye on our faculty website or social nets with the hashtag #ISS2021.