105 What? Archives are our collective and personal memory, a unique and irreplaceable part of our heritage. They nonetheless represent challenges in terms of collecting materials, preserving them, and making them accessible to the public. Despite the large collection of the Rotterdam City Archive (Stadsarchief Rotterdam), some memories, stories and oral traditions were at risk of oblivion as citizens were not sufficiently involved in heritage collection, preservation, and dissemination. Rotterdam has therefore formalised a cultural heritage collection process to enrich the city’s historical archives through crowdsourcing. Together with local association DIG IT UP, the Rotterdam City’ Archive identified the features needed for a digital tool to develop a participatory model for archiving local urban history together with the communities. The chosen open-source software, ‘OMEKA-S’, is adaptable and facilitates digital exhibitions and data sharing. OMEKA is a free, open-source content management system for online digital collections. DIG IT UP uses a very open licensing system. DIG IT UP also works with digital tools and makes them accessible by developing user-friendly templates for collecting and archiving personal memories, using the international cultural heritage description protocol and formats, and creating an instruction manual. DIG IT UP also trains volunteers in archiving themselves the gathered content. More info Report from a peer learning visit with Rotterdam