Objective This third seminar in a series of five co-funded by the European Commission on issues related to detention will focus on the impact of detention on prisoners It will also examine issues related to juvenile justice and detention, especially Directive (EU) 2016/800 on procedural safeguards for children who are suspects or accused persons in criminal proceedings, as well as the proper use of Framework Decision 2008/909/JHA on the transfer of prisoners. Key topics • Impact assessment of detention on prisoners: comparison of practices in different Member States • Focus on juvenile justice in relation to detention and the new Directive (EU) 2016/800 on the rights of children suspected or accused in criminal proceedings • The application and correct use of Framework Decision 2008/909/JHA on the transfer of prisoners