  Modern spectroscopic data on light non-strange meson spectrum is analyzed. It
is argued that the observed regularities of experimental spectrum for highly
excited states favour a partial restoration of all approximate classical
symmetries of QCD Lagrangian (conformal, chiral and axial) broken by the
quantum corrections. The rate of restoration of classical symmetries is
estimated. The dependence of the resonance widths from the corresponding masses
is systematically checked. On average, it turns out to be universal for the
high excitations as predicted by the effective string description.
