Is a photograph from 1886 really a portait of Vincent van Gogh, or is it “a simple case of mistaken identity?” Van Gogh painted more than 40 self-portraits but there are only two photographs in existence that are widely believed to be the artist – at the ages of 13 and 19. The latest discovery, bought for just $1 in the early 1990s in an antique dealer’s shop, is the subject of a new exhibition that attempts to make the case for its authenticity.”