A self-portrait of Dutch post-Impressionist artist Vincent van Gogh has been uncovered hidden behind one of his paintings.
National Galleries of Scotland said on Thursday art conservators made the discovery, believed to be a first for a UK institution, during an x-ray examination of Van Gogh's 1885 artwork "Head of a Peasant Woman" for an upcoming exhibition.
It said the x-ray showed "a bearded sitter in a brimmed hat with a neckerchief loosely tied at the throat. He fixes the viewer with an intense stare, the right side of his face in shadow and his left ear clearly visible".