The “Open Science” principle aims to make academic processes publicly accessible, understandable and usable. To this end, a variety of approaches are pursued, such as Open Access, Open Source, Citizen Science and Open Educational Resources. As various statements from the European Union and the G7 show, Open Science is gaining in importance within the sphere of academic policy at the European and international level. The Leibniz Association and its member institutes support this development and help shape it. For example, they have been championing Open Access – free access to academic publications – for many years now with a variety of activities.