Dan Brown's immensely popular title, The Da Vinci Code, has been one of the most successful bestsellers in history. In fact, its cultish following has reached international proportions and the Da Vinci Code phenomenon has now prompted a major motion picture production which is sure to be a box office smash. However, few of us have a clear understanding of the background material on which the author based this work which is important to understanding the occult history of the last millennia.The authors of The Keys to the Da Vinci Code reveal the truth about the secret societies that protected the secret of the Grail, the descendants of Jesus and Mary Magdalene, the mystery of a set of occult manuscripts discovered at the end of the 19th century in the of R