It's at the National Gallery in London, so I've seen it a fair few times, and I've got to say, the "just showing off" theory is pretty supportable. That entire

It's at the National Gallery in London, so I've seen it a fair few times, and I've got to say, the "just showing off" theory is pretty supportable. That entire painting looks like The Da Vinci Code. Laden with symbols and impressive bits of painting.