Research infrastructures (RI) have grown of importance in all fields in the last decades. Research infrastructures allow for scientific innovation that requires long-term investment. In Europe the larger infrastructures are often collaborative effort by many different countries. A framework of performance indicators exist nowadays to assess the performance of research infrastructures. However, there is an interest in looking also beyond the core functioning of research infrastructures and understand the broader impact of RIs on science at large, society, economy and politics. Understanding impact is much more difficult than understanding performance. While the reflections and publications on how to define and measure impact has grown over the last year, a unified framework or consensus on how to assess the impact of research infrastructures does not yet exist. Taking as point of departure the conference organized by the ESFRI Strategic Working Group on Social and Cultural Innovation on the impact of research infrastructures, which took place in 2018 in Bologna, the ESFRI Strategy Working Groups have joined forces to organize a follow-up conference to discuss the meaning and the possible measurement of impact further. For more information: https://forscenter.ch/impact-of-research-infrastructure