The national academies of the G7 and G20 countries provide scientific advice for the annual summits of Heads of State and Government. They prepare science-based recommendations related to topics on the summit agendas. In each case, the national academy of the host country takes the lead. After successfully coordinating policy advice for G7 summits, the Leopoldina took on this role for the first time with the newly created Science20-Dialogue during the German G20 Presidency in 2017.