Following a two-year delay due to the pandemic, the Institute for Advanced Sustainability Studies (IASS) celebrated the tenth anniversary of its foundation and its forthcoming integration into the Helmholtz Association with a festive ceremony in Potsdam under the motto “10+2”. The President of the German Environment Agency, Dirk Messner, gave the keynote speech and IASS Founding Director Klaus Töpfer attended as the guest of honour. The event concluded with a tribute to IASS Scientific Director Ortwin Renn, who will retire at the end of the year.