The 21th Symposium “Solar Thermal Technologie” organized by the Eastbavarian Institute for Technology Transfer, OTTI e.V. takes place from 11 - 13 May 2011 at the former German monastery Banz, Bad Staffelstein. Main topics are the latest technical developments but also aspects of economy and market policy. Architects will find a forum to discuss problems and experiences in planning and realization of buildings with solar thermal systems. The Symposium is supplemented by an extensive exhibition with the latest developments in the solar industry. All presentations will be performed in German.