Welcome to Clowder4Digital Cultural Heritage, the content management system for the Cultural Heritage communities of the Horizon 2020 funded NI4OS project (https://ni4os.eu/). C4DCH is a highly extensible active curation-based research data management platform. Users can link and organize datasets in online collections for the creation of semantically structured data repositories specialized for digital cultural heritage. C4DCH enables users to form an online collaboration environment to support research communities and activities, and disseminate results. The C4DCH’s Documentation is available through the top navigation Explore/Spaces dropdown.