In the course of their investigation into Leonardo da Vinci, Lynn Pickett and Clive Prince found clues about his strangely passionate belief in the importance of John the Baptist. Here, along with a re-assessment of the significance of Mary Magdalene and the Sacred Feminine, the authors reveal that Da Vinci's apparently peculiar religion was shared by the Knights Templar. And their profoundly heretical belief that the Baptist was superior to Jesus himself still has the power to pose a threat to the very foundations of the Christian Church...