In 2022, conservators X-raying a Van Gogh painting in Edinburgh found a hidden self-portrait of the artist on the back of the canvas, concealed for more than a century under layers of glue and cardboard
In 2022, experts at the National Galleries of Scotland discovered a hidden self-portrait of Vincent van Gogh on the reverse side of his 1885 work, 'Head of a Peasant Woman', after X-raying the canvas during routine exhibition preparations.





