  I discuss the most recently discovered open charm mesons, both with and
without strangeness. By exploiting the heavy quark limit, strong decay widths
of such mesons are computed. Comparison between theoretical predictions and
experimental measurements are useful to assign the right quantum numbers to
such states. As for hidden charm mesons, I consider the case of X(3872).
Analysis of its radiative decays to $J/\psi \gamma$ and $\psi(2S) \gamma$ shows
the plausibility of the identification with $\chi_{c1}(2P)$.
