Old news is so exciting! This theory has been around for like a century, at least. I was taught it in college art appreciation, I'm sure others were too. Yeah, and about that digging him up? Two places claim to have his burial site, both are churches. The leading contender is Chapel of Saint-Hubert in the castle of Amboise - which is in France. And if you want to dig up a church in France, or Italy, it's going to take the Pope, not 'authorties' to give you permission.