On November 4th and 5th, seven teams of historians, programmers, heritage and data specialists locked themselves in the Dom Tower in Utrecht for almost 24 hours to create new applications linking together Heritage information from different data sources. As always Wikidata was one of the popular sources, providing a wealth of both historical and current information. Read more about the projects and winning teams (in Dutch) at the Netwerk Digitaal Erfgoed (NDE) website.