Outstanding questions of Quantum Chromodynamics in the non-perturbative regime are discussed. A research program addressing these questions is outlined. This program is based on the availability of antiproton beams of unprecedented quality and intensity at the planned future accelerator facility at GSI Darmstadt. The physics potential of this project and the accelerator and detector concept are presented.

PACS numbers: 12.38.--t, 12.38.Aw, 13.75.--n, 14.20.Jn