Possibly considered as one of the most beautiful and complex legendary symbols that has transcended over time, as a Chalice from the Christian era and as a Grail in chivalric literature to the present day. An eminently Christian symbol, representing the cup used to contain the wine in the Holy Supper (Mk 14:23), and the wine in the celebration of the Eucharist which through transubstantiation (Council of Trent 1545), transforms with the Blood of Christ. It also represents the cup in which Joseph of Arimathea collected the blood of Jesus at the crucifixion, and which later in chivalric literature from the Middle Ages to the present day becomes as Holy Grail. The symbolism of the chalice with the Host is an attribute of the Eucharist; the chalice with a coiled serpent is an attribute of the apostle St. John; the chalice with a closed book refers to Saints John Chrysostom and Bonaventure; with a closed book and a stole in the priestly order and the chalice with the bread in Melchizedek (Gen 14: 17-20). In chivalrous Iconography the cup of Joseph of Arimathea turned into the Holy Grail was properly a supernatural object, and its main virtues are that it gave enlightenment and eternal life to those who drank from it. The true symbolism of the Grail is twofold, its own virtues and its search, which forces us to endow ourselves with highly spiritual conditions of inner life. Worldly life and desires divert attention and prevent recognition of the right path. This blindness to the spirit makes one pay more attention to the material realities of research than to the spiritual conditions that are required. This inaccessible search for the Grail symbolizes the constant longing to draw closer to the Creator and the final Understanding, something that is never done with a spear like the medieval knights, but with a radical transformation of mind and heart. A modern controversy, older than the book "The Da Vinci Code" by Dan Brown popularized by him, is the French theory, that by calling them the Holy Grail as Holy Grail, moving the G becomes in French: “Sang Real” (Royal Blood), referring to a supposed descent of Jesus with Mary Magdalene, and which in principle seems nothing more than a literary curiosity.