One of the most famous works of art from twentieth-century history has greatly moved art lovers. Pablo Picasso’s painting the “Guernica” is sick and its conditions are serious although stable: this was the diagnosis given by experts at the Reina Sofia museum in Madrid, who in these days have been carrying out a last check-up on Picasso’s work. An analysis that will allow to understand more thoroughly its damage, its genes, the hidden curiosities about its life.