Die Unsichtbare Stadt (The Invisible City), a project by the KISD at TH Köln, focuses on both the different plans for and the various appropriations of the Ebertplatz square in Cologne. For PASSAGEN 2019, KISD will be opening its temporary urban design studio, questioning sensuous perceptions, invisible infrastructures and space-time structures as well as exploring what heated debates about public squares tell us about society.