  In this talk, I review the recent experimental results on charmonium
spectroscopy from BESIII, Belle, BaBar and CLEOc. Below the open-charm
threshold, the masses and widths of spin-singlet states eta_c, eta_c(2S), h_c
are measured with high precision. Above the threshold, chi_{c2}(2P) is
identified in the process gamma gamma -> chi_{c2}(2P) -> gamma D bar{D};
Evidence of X(3823) is found in the M(chi_{c1} gamma) invariant-mass
distribution for B -> gamma chi_{c1} K decays, the measured properties are
consistent with the missing psi_2(1^{2}D_2) state.
