Cambridge experts have helped verify a self portrait by Rembrandt.
Rembrandt is thought to have depicted himself in at least 40 paintings but the National Trust painting, thought to be worth £30million and featuring the artist in "fanciful costume"
The portrait is dated 1635, when Rembrandt, who is considered to be one of the greatest painters in European art history, was 29 years old.
He was living in Amsterdam at the time and his self-portraits were becoming increasingly popular as his fame and wealth grew.
The painting will go on display at Rembrandt Revealed, at Buckland Abbey in Devon, on June 13.
Cambridge experts have helped prove an art work was created by Rembrandt.
Painting conservator Christine Slottvedd Kimbriel said: "What was revealed was a true depth of colour, much more detail and a three-dimensional appearance to the fabric in Rembrandt's cloak."
The Hamilton Kerr Institute used hi-tech infra-red reflectography and X-ray photography to help verify the picture.
Research showed that the pigments, including the blue mineral azurite and blue cobalt, were consistent with those used by Rembrandt and his studio assistants.
Experts from Cambridge have helped to prove that a self-portrait was painted by Rembrandt following months of analysis.
The authenticity of the 1635 painting has been questioned for decades. It depicts the Old Master looking out at the viewer while wearing a black cloak, a feathered bonnet and a metal band around his neck from a suit of armour.
Experts at the Hamilton Kerr Institute (HKI) in Cambridgeshire have now removed several layers of aged and yellowed varnish and analysed the artist's signature - to prove it was genuine.