  We review some work done by us calculating matrix elements for Kaons.
Emphasis is put on the matrix elements which are relevant to predict
non-leptonic Kaon CP violating observables. In particular, we recall our
results for the \hat B_K parameter which governs the \bar{K^0}-K^0 mixing and
update our results for epsilon'_K including estimated all-higher-order CHPT
corrections and the new results from recent analytical calculations of the
\Delta I=3/2 component. Some comments on future prospects on calculating matrix
elements for Kaons are also added.
