  Results from a multi-channel partial wave analysis of elastic and inelastic
$\pi N$ and $\gamma N$ induced reactions are presented. The analysis evidences
the existence of a spin-quartet of nucleon resonances with total angular
momenta $J^P=1/2^+,..., 7/2^+$. All states fall into a $\pm130$\,MeV mass gap
centered at 1.97\,GeV. The spin quartet is at variance with S-wave diquark
configurations required in classical di-quark models.
