The building of the former DORIS storage ring now houses the SINBAD ("Short Innovative Bunches and Accelerators at DESY") accelerator complex with various infrastructures for accelerator R&D: the linear accelerator ARES for accelerator research with ultrashort electron pulses for medical purposes, the AXSIS facility for terahertz -driven acceleration to generate ultrashort X-ray pulses for materials science or medical imaging, and the high-power laser KALDERA for research into laser-driven plasma acceleration.