Laser cleaning in works of art has a number of advantages over traditi
onal techniques of restoration. In this article, the technique used an
d the physical mechanisms that explain the process of ablation of poll
utants are described. The results obtained in the cleaning of statues
of marble and alabaster are exposed as well as oil-painting restoratio
n. In this last specific case, the Nd:YAG laser is used with successfu
l results.