Forensic Provenance and the Discovery of a New Leonardo da Vinci
What a story! A painting known to have existed due to the existence of preparatory drawings by the master and historical evidence that King Charles the First of England had it in his collection, da Vinci's work "Salvator Mundi" (Savior of the World) has turned up literally beneath layers of "overpaint."
Read more at CNN.COM, but I found this passage particularly interesing:
"The truth revealed itself little-by-little as Modestini painstakingly removed the layers of varnish and over-paint in her studio and Simon carefully studied the painting's provenance, comparing it with da Vinci's other paintings and preparatory drawings."
This work joins only 15 known surviving paintings attributed to the 15th Century artist and scientist. It is going on display at New York's Met this November.