Historical inaccuracies
The Da Vinci Code generated criticism when it was first published for the fictitious description of the core aspects of Christianity and descriptions of European art, history, and architecture. The book has received negative reviews mostly from Catholic and other Christian communities. Many critics took issue with the level of research Brown did when writing the story. The New York Times writer Laura Miller characterized the novel as "based on a notorious hoax", "rank nonsense", and "bogus", saying the book is heavily based on the fabrications of Pierre Plantard, who is asserted to have created the Priory of Sion in 1956.
Critics accuse Brown of distorting and fabricating history. Theological author Marcia Ford considered that novels should be judged not on their literary merit, but on their conclusions:
Regardless of whether you agree with Brown's conclusions, it's clear that his history is largely fanciful, which means he and his publisher have violated a long-held if unspoken agreement with the reader: Fiction that purports to present historical facts should be researched as carefully as a nonfiction book would be.
Richard Abanes wrote:
The most flagrant aspect ... is not that Dan Brown disagrees with Christianity but that he utterly warps it in order to disagree with it ... to the point of completely rewriting a vast number of historical events. And making the matter worse has been Brown's willingness to pass off his distortions as 'facts' with which innumerable scholars and historians agree.
Much of the controversy generated by The Da Vinci Code was due to the fact that the book was marketed as being historically accurate; the novel opens with a "fact" page that states that "The Priory of Sion—a French secret society founded in 1099—is a real organization", which is disputed. The fact page itself is part of the novel as a fictional piece, but is not presented as such. The page also states that "all descriptions of artwork, architecture, documents ... and secret rituals in this novel are accurate", a claim disputed by numerous academic scholars and experts in numerous areas.
Brown addressed the idea of some of the more controversial aspects being fact on his website, stating that the page at the beginning of the novel mentions only "documents, rituals, organization, artwork and architecture" but not any of the ancient theories discussed by fictional characters, stating that "Interpreting those ideas is left to the reader". Brown also says, "It is my belief that some of the theories discussed by these characters may have merit" and "the secret behind The Da Vinci Code was too well documented and significant for me to dismiss."
In 2003, while promoting the novel, Brown was asked in interviews what parts of the history in his novel actually happened. He replied "Absolutely all of it." In a 2003 interview with CNN's Martin Savidge he was again asked how much of the historical background was true. He replied, "99% is true... the background is all true". Asked by Elizabeth Vargas in an ABC News special if the book would have been different if he had written it as non-fiction he replied, "I don't think it would have."
In 2005, UK TV personality Tony Robinson edited and narrated a detailed rebuttal of the main arguments of Brown and those of Michael Baigent, Richard Leigh and Henry Lincoln, who authored the book Holy Blood, Holy Grail, in the program The Real Da Vinci Code, shown on British TV Channel 4. The program featured lengthy interviews with many of the main protagonists cited by Brown as "absolute fact" in The Da Vinci Code. Arnaud de Sède, son of Gérard de Sède, stated categorically that his father and Plantard had made up the existence of the Prieuré de Sion, the cornerstone of the Jesus bloodline theory: "frankly, it was piffle", noting that the concept of a descendant of Jesus was also an element of the 1999 Kevin Smith film Dogma.
The earliest appearance of this theory is due to the 13th-century Cistercian monk and chronicler Peter of Vaux de Cernay who reported that Cathars believed that the 'evil' and 'earthly' Jesus Christ had a relationship with Mary Magdalene, described as his concubine (and that the 'good Christ' was incorporeal and existed spiritually in the body of Paul). The program The Real Da Vinci Code also cast doubt on the Rosslyn Chapel association with the Grail and on other related stories, such as the alleged landing of Mary Magdalene in France.
According to The Da Vinci Code, the Roman Emperor Constantine I suppressed Gnosticism because it portrayed Jesus as purely human. The novel portrays Constantine as wanting Christianity to act as a unifying religion for the Roman Empire, thinking that Christianity would appeal to pagans only if it featured a demigod similar to pagan heroes. According to the Gnostic Gospels, Jesus was merely a human prophet, not a demigod. Therefore, to change Jesus' image, Constantine destroyed the Gnostic Gospels and promoted the gospels of Matthew, Mark, Luke, and John, which portray Jesus as divine or semi-divine; however, most scholars agree that all Gnostic writings depict Christ as purely divine, his human body being a mere illusion (docetism). Gnostic sects saw Christ this way because they regarded matter as evil, and therefore believed that a divine spirit would never have taken on a material body.