Open Cultuur Data is a Dutch network that aims to make cultural data from institutions openly available and accessible in order to create new cultural applications. The network includes cultural professionals, developers, and open data experts. It works to collect and publish open cultural datasets from organizations like museums and archives. It also organizes events like hackathons to encourage developers to build apps using this open cultural data. The goal is to make culture more accessible to the public in new ways through open data and new applications.