The art and peace project "50 Cities - 50 Traces" is supported by the cooperation between Hannover as Lead City of the German Mayors for Peace, the 50 Cities - 50 Traces Project Office in Stuttgart and the Peace Workshop Mutlangen e. V. The project was presented by Hannover as the Lead City of the German Mayors for Peace at the Federal Conference of the German Mayors for Peace in Braunschweig, at the Executive Conference in Ypres to the participating executive cities and at the General Conference in Nagasaki to all participating cities and is an offer to all German, but also to the European and non-European Mayors for Peace cities. Hanover has taken over the coordination in the sense of winning further exhibition cities and has prepared a pedagogical booklet that can be downloaded from the participating cities on the Mayors for Peace website and on the project website soon.