» National Geographic Magazine: Lady with a Secret | A chalk-and-ink portrait may be a $100 million Leonardo.
By Tom O’Neill
Photograph by Gianluca Colla
Bianca Sforza attracted few stares when introduced to the art world on January 30, 1998. She was just a pretty face in a frame to the crowd at a Christie’s auction in New York City. Nobody knew her name at the time, or the name of the artist who had…
(Source: National Geographic, via russiannut)
