  We construct the effective chiral Lagrangian for chiral perturbation theory
in the mesonic even-intrinsic-parity sector at order $p^6$. The Lagrangian
contains 112 in principle measurable + 3 contact terms for the general case of
$n$ light flavours, 90+4 for three and 53+4 for two flavours. The equivalence
between equations of motion and field redefinitions to remove spurious terms in
the Lagrangians is shown to all orders in the chiral expansion. We also discuss
and implement other methods for reducing the number of terms to a minimal set.
