The Friends of Music Society (the coordinator), in collaboration with the Aristotle University of Thessaloniki, the University of Ioannina, the University of Macedonia and the technical company AltSol, will cooperate to create a single open data platform that will combine the music repositories of the three institutions and unify them in the form of entities based on specific ontologies that will develop during the project. The aim of the project is to create a single musical ontological depository that will include: the Greek Double Bass Archive, the Vassilis Tsitsanis Recordings Collection and the Mikis Theodorakis Archive.