Coding da Vinci is the first German open cultural data hackathon. Founded in Berlin in 2014, Coding da Vinci brings cultural heritage institutions together with the hacker & designer community to develop ideas and prototypes for the cultural sector and for the public. Whilst a classic hackathon offers its participants only a short time frame - typically a weekend - to develop software applications, Coding da Vinci runs for a total of at least 6 weeks. This extended timeframe provides much-needed space for the formerly separate worlds of creative technology and cultural heritage to interact with and learn from each other. The sprint begins with a two-day kick-off event: plenty of time for institutions to present their data sets, and for participants to make contact with the cultural heritage institutions, develop project ideas, and form teams. Over the next weeks, the teams work together to develop and submit their prototypes, before presenting them at the public award ceremony.