The sign of the cross, with the intention of reflecting an idea of material form, has been used by the man during all the stages of his life: painted in caves or carved in wood, bones and stones; in representation of the life or the death; he has guarded always in his interior this cosmic-religious sense that so much we want to uncover. His relation with the divine thing, the immaterial thing, the inaccessible thing and with the incomprehensible origin of the World it has done of this sign, the excellent symbol of many beliefs.