As promised on the Zonkboard, here’s a list of the non factual errors in ‘The Da Vinci Code’. I’ve issued them in point form note because there’s so many of them, but I’m more than willing to go in more detail where it’s requested.
For those that say “it’s a work of fiction” I present to you a comment from the early pages of the novel, prior to chapter one:

All descriptions of artwork, architecture,
documents, and secret rituals in this novel
are accurate.
Thus, these errors concern only his descriptions of artwork, architecture, documents, and secret rituals, as well as factually based statements of legitimate organizations.

• The Priory of Sion started in 1956, not 1099.
  
• The only noted “celebrity” Grand Master was Jean Cocteau.
  
• Jesus was always considered divine by his folllowers.
  
• The Dead Sea Scrolls are not Christian records, they’re Jewish.
  
• The Dead Sea Scrolls don’t even mention Jesus.
  
• The Gnostic Gospels do not contain a more human portrayal of Jesus.
  
• There were not over 80 books considered for the New Testament.
  
• Constantine had nothing to do with the development of the Bible.
  
• The life of Jesus wasn’t recorded by “thousands”; most followers were illiterate.
  
• Many Jewish men were single or celibate in Jesus’ day.
  
• The Gospel of Philip is written in Coptic, not Aramaic.
  
• The word “companion” is not Aramaic, it’s Greek.
  
• The greek word “companion” does not mean spouse or companion.
  
• The word “Yahweh” was not derived from the tetragrammaton YHWH.
  
• The church did not burn five million witches at the stake.
  
• The motions of Venus do not trace a pentacle.
  
• The motions of Venus have nothing to do with the Olympiad length.
  
• The Olympic Games were not celebrated in honour of Aphrodite.
  
• The Olympic ring logos are not a secret tribute to Aphrodite.
  
• There is no documented history of Noah being an albino.
  
• Tarot cards do not teach goddess doctrine.
  
• Playing card suits do not contain Grail symbolism.

That’s all for now – take your pick.
PS: I almost forgot – if the Catholic Church has spent so much time demonizing Mary Magdalene, it seems odd they’ve made her a Saint. Strange method of demonizing.
PSII: I should note one thing, as just discussed on MSN with Mark. This is not necessarily a religious discussion. This is, however, a factual error discussion of basic errors taken for truth by many people. Dan Brown is not a historian, theologian, or anything but a fiction writer.