Patch of grass1887 by Vincent van Gogh

A portrait of a peasant woman was found under this painting:
"A Vincent van Gogh portrait of a peasant woman that was painted over by the artist has been revealed in extraordinary detail through use of an x-ray technique that has never before been applied to a painting." Article at http://www.theguardian.com/artanddesign/2008/jul/31/2
Click to select the cover image for this artwork.
Source: google.com