Fred Sanders' post on Middlebrow outing nine art errors in that atrocious, yet very popular and profitable novel, The Da Vinci Code is a gem. I had plenty of reason to disbelieve Dan Brown's far-fetched historical claims, but I didn't have much ammo about the art stuff. I thought there was something fishy about it! I really must remedy my ignorance about art.
Funny and informative is the post - which is also a decent way to describe Dr. Sanders. Check it out.