It is truly one of the world’s great cities. So Cotton Malone, bookseller, became a new addition to that busy square. I also spent time in southern France discovering much of the history and many of the locales that ended up in this story. Most of the plot came to me while traveling, which is understandable, given the inspiring qualities of Denmark, Rennes-le-Château, and the Languedoc. But it’s time to know where the line was drawn between fact and fiction. The crucifixion of Jacques de Molay, as depicted in the prologue, and the possibility of his image being that on the Shroud of Turin (chapter 46) are the conclusions of Christopher Knight and Robert Lomas. I was intrigued when I discovered the idea in their work, The Second Messiah, so I wove their innovative concept into the story. Much of what Knight and Lomas say—as related by Mark Nelle in chapter 46—makes sense and is likewise consistent with all of the scientific dating evidence amassed from the shroud over the past twenty years.