Originally a Pierre Plantard manuscript that failed to find a publisher, and extensively rewritten by Gérard de Sède, "L'Or de Rennes" presented as fact various claims about Bérenger Saunière and Rennes-le-Château that were the authors' inventions, in order to embellish a story about the discovery of a hidden secret. The book was most famous for its reproduction of two "parchments" that were allegedly discovered by the priest: but for a variety of different reasons they have been identified as forgeries by Philippe de Chérisey.