Røros Museum has comprehensive cooperation agreements with other organisations, museums, branches of the public service and others. In recent years we have had several large cooperation projects with other museums, including, preservation of buildings and textiles. Røros Museum has taken the initiative in and the project management of the introduction of a shared common collection database in Trøndelag. We consider this will be a valuable resource for future shared projects as well as giving the general public the possibility to search for items by using the database on DigitalMuseum.