Monasterium.net is a virtual archive, a community and a research platform on medieval and early modern charters. About 60 archival institutions from 10 European countries and research projects from all around the world make more than 450.000 documents available online (number continously growing). The platform offers not only passive access by browsing and faceted search but also serves as a platform for community encagement and collaborative editing with advanced editing tools (code free XML editing and text image linking).