The city anniversary 2020 app - created on the occasion of the 900th birthday of the city of Freiburg. Freiburg's change is unique. The change between then and now and the future development can now be experienced interactively on site with the free Freiburg time travel app. At more than 100 selected stations, you can immerse yourself in Freiburg's past and the near future, be guided to the individual stations via navigation and see historical photos and planned construction projects from exact