This volume constitutes the proceedings of the Sixth Workshop on Non-Perturbative QCD, held in Paris in June 2001. It is devoted to different facets of QCD, stressing non-perturbative, analytic and lattice formulations, scattering solutions and approximations, and the understanding of recent RHIC experiments. It discusses ideas of the fifth dimension, originating in brane theory, as well as possible experimental tests and predictions of those ideas.