In 1982, Henry Lincoln and his colleagues published Holy Blood, Holy Grail, an investigation of Rennes-le-Château, a small town in France where the discovery of a series of parchments suggested the possibility that Jesus's bloodline still exists. The book later inspired The Da Vinci Code, which both popularized and distorted Lincoln's original research. Revisiting this mysterious locale, Lincoln reveals through further surveys, decoding, and analysis that this is the site of a vast megalithic Christian masterpiece—a holy place of enormous size and importance.