Leonardo Da Vinci Mural Discovered Under Layers Of Paint During Sforza

Restorers working on renovations for the Sforza Castle in Italy got quite a shock this week when they peeled away several coats of paint to reveal part of a Leonardo Da Vinci mural. Buried beneath 17 layers of whitewash, the portion of the drawing -- which depicts a tree root stuck in a rock -- has likely been hidden from view for at least 500 years.