MOSAICA addresses the presentation and discovery of just about any cultural heritage and that will allow multiple groups of interest to develop innovative and creative user experience. It´s a European project and INESC is responsible for the implementation of a Peer-to-Peer(P2P) Distributed Content Management System (DCMS) that will store heritage contents with metadata associated for semantic querying. This presentation will address the decentralized storage mechanism, overall architecture of the P2P DCMS, the adopted P2P technologies (JXTA and Bittorrent), the SOAP interface implemented in each peer for integration with a larger Service Oriented Architecture (SOA), mechanisms for high availability of contents (super seeding activated through RSS feeds), integration with MOSAICA semantic layer, current implementation state and future developments.