报告摘要: New synchrotron radiation facilities emerged at DESY during the last years. This talk will report on - PETRA III, the 1nm emittance 3rd generation source commissioned in 2005 - the Free Electron User Facility FLASH being in operation since 2005 and undergoing a major up-grade in the moment - the status of the European XFEL to start user operation in 2015. Emphasize will be put on beam dynamics issue and accelerator technolgy development.