The Forum Open City is the central German conference for issues surrounding Open Data and Open Government. It takes place annually in the KörberForum in Hamburg. Subtitled participatory, digital, sustainable, the conference´s thematical focus aims at the design of tomorrows digital city. What does it require? How can citizens get involved? Where do cities find support and how can digitalization aid public administrations in dealing with new challenges such as the Coronavirus pandemic and the climate crisis?