  We determine the chiral condensate from simulations of quenched lattice QCD
with Wilson fermions. Our measurements have been obtained with high statistics
at three values of the gauge coupling, corresponding to UV cutoffs in the range
2 - 4 GeV. Several improvements have been made with respect to earlier lattice
computations. The most important are the non-perturbative renormalization of
the condensate, the use of the tree-level improved Clover action and the
reduction of the systematic error due to uncertainties in the lattice
calibration. Our result for the chiral condensate in the $\msbar$ scheme is
  (\bar\psi \psi)^{\msbar}(mu = 2 GeV)
  = - 0.0147(8)(16)(12) GeV^3
  = - [245(4)(9)(7) MeV]^3
  where the first error is statistical, the second is due to the
non-perturbative renormalization and the third due to the lattice calibration.
