What I find amusing about this Da Vinci Code stuff is that no one has pointed out that Brown didn't invent this story himself.  He took an old medieval myth about the Holy Grail and reworked it.  Many years ago,  I read  a story about the holy grail not being a cup, but Mary Magdalene.  This medieval myth said that Christ survived the cross and he and Mary travelled around the Mediterranean; finally settling in southern France, where they had children.  The story continued to say that their offspring became the noble families of Europe, and that the Nobility therefore carried Christ's blood in their veins!  The very self-serving nature of the story makes it clearly balderdash!