Some say the Templars have been involved in everything from the Cathar heresy to the French revolution. A Templar connection has been claimed for the Turin shroud, Mary Magdalene and the Holy Grail. The "Rough Guide to the Templars" investigates the facts, legends and mysteries surrounding their rise and sensational fall. It asks if there is any historical truth behind the Templar-inspired bestsellers "Labyrinth", "The Last Templar" and "The Da Vinci Code". And what of the fabled links with Masonic conspiracies and even US presidential politics?