With three new electron accelerators, the PTB is expanding its measuring capabilities for dosimetry in radiation therapy. The Richard Glocker Building, which was dedicated on 11th July and which houses the new accelerators, offers unique conditions both for practical measurements as well as for fundamental experimental questions. With two therapy accelerators, the type of which is used also in clinics, and an 11 meter-long linear accelerator, photons and electrons can be produced in the energy range from 0.5 MeV to 50 MeV. With it, dosimeters and measuring methods can be investigated under any conceivable, practical irradiation conditions. This was one of the essential conditions for the design of the facility, because in view of the continually growing progress of the medical irradiation methods, the demands made on dosimetry are growing at the same time.