I held this speech at Europeana AGM, November 2016 in Riga. Cities have to be relevant for their constituents, be it citizens, businesses, NGOs, .... Open innovation and specifically hackathons can contribute significantly to this goal. We conducted the culture hackathon "Coding da Vinci North" in 2016 in Hamburg. It was a great success in terms of particitpation, public awareness, outstanding results and a lot of fun for everybody who was involved (besides a whole lot of work of course). The most striking outcome were the excellent results from the teams who used the cultural data provided to develop solutions. Many of which have been further developed and have beeng successfully deployed to the public. To find out more about the hackathon please visit: codingdavinci.de