The truth behind Dan Brown's controversial book is revealed in this historical analysis. The reality of the Catholic offshoot Opus Dei, the hard facts about the bloodline of Christ and King David, the origins of the Knights Templar and the infamous Priory of Sion, the secrets of Temple Church and Rosslyn Cathedral, and the life of the real Sauniere are fully examined. Also included is an exhaustive tour of locations visited by the novel's characters: the Louvre Museum, l'Eglise de Saint-Sulpice, Rue Haxo, Chateau Villette, Westminster Abbey, Newton's tomb, Chapter House, and St. Faith's Chapel.