author of  "Holy Blood, Holy Grail", the 1982 book upon which "The Da Vinci  Code" based much of its history. The program was shot in places like  Rosslin Chapel in Scotland, the London Temple (built by the Templar  Knights), various cities in Southern France, and at the Louvre  Pyramid, all of which are featured in the book. The program is also  the first widescreen, high