  On the basis of the three-particle Bethe-Salpeter equation we formulated a
relativistic quark model for baryons. Assuming the propagators to be given by
their free form with constituent quark masses and the interaction kernel by an
instantaneous potential, which contains a string-like parameterization of
confinement and a flavor dependent interaction motivated by instanton effects
we can account for the major features in the baryon spectrum, such as the low
position of the Roper resonance and the occurrence of approximate parity
doublets apparent in the Nucleon- and Lambda-spectra.
