  The properties of mesonic resonances can be calculated in terms of the
low-energy coefficients of chiral perturbation theory (chiPT) by extending
unitarized chiPT to higher energies. On the other hand these low-energy
coefficients can be calculated in two different models, namely (i) by assuming
resonance saturation and (ii) within a constituent quark model. By matching the
expressions of the two models combined with the results of unitarized chiPT and
the Weinberg sum rules the properties of vector and axial-vector mesons can be
calculated in the combined large-N_c and chiral limit.
