An essential notion in the #1 New York Times bestseller The Da Vinci Code is the existence of an age-old French society, the Priory of Sion, whose task it is to protect Christ's sacred bloodline. In The Sion Revelation, Picknett and Prince reveal the story of the Priory, taking readers on a highly significant, disturbing, and even alarming ride through history into an intriguing world where a great many uncomfortable facts will have to be faced, both religious and political. Drawing on a wealth of astonishing evidence, they answer numerous questions that shroud this society, including: • Does the Priory actually exist or is the group's entire history an elaborate hoax? • Was Leonardo da Vinci really one of the Priory's Grand Masters? • What is the truth behind Pierre Plantard, the enigmatic French aristocrat who claimed to be a Priory Grand Master -- and who some claim was a Nazi sympathizer? • Could the Priory be a front for other occult societies in Europe with religious or even political agendas? By carefully untangling centuries of obfuscation, rumor, and documented fact, The Sion Revelation unravels the great intricacies of this secret society and takes us on a historical journey that is as groundbreaking in its explanation as it is riveting in its telling.