  Hadronic event shape distributions are determined from data in e+e-
collisions between 183 and 207 GeV. From these the strong coupling alpha_s is
extracted in O(alpha_s^2), NLLA and matched O(alpha_s^2)+NLLA theory.
Hadronisation corrections evaluated with fragmentation model generators as well
as an analytical power ansatz are applied. Comparing these measurements to
those obtained at and around M_Z allows a combined measurement of alpha_s from
all DELPHI data and a test of the energy dependence of the strong coupling.
