The International Society of Public Law (ICON•S is an international scholarly society associated with the International Journal of Constitutional Law (ICON) which holds regular annual conferences, most recently in Wrocław in 2022. You can find more information on ICON•S here.
ICON•S Germany is one of the many regional chapters of ICON•S and was founded in 2018 by Michaela Hailbronner (University of Gießen), Christoph Möllers (Humboldt University Berlin) and Tim Wihl (Free University Berlin).