Back in the '60s, bosses at Derby Museum decided the artwork, Coliseum by Moonlight wasn't a genuine work by the artist Joseph Wright and decided to cast the "replica" off into a storeroom.
However, the painting was indeed an original - it had just been painted over badly by a restorer.
Decades down the line, an art conservator and avid Wright fan, was researching the artist's work and discovered documents that showed the museum owned two pieces of his art.
There, the conservator explained his interest and spoke to the senior art curator, Lucy Bamford, who, after some detective work, discovered the discarded painting and realised its true worth.
Lucy was quoted in the Daily Mirror saying: "We said: 'There's one in the store but it's absolutely terrible.' Once we got it out, we realised there was something behind that painting."
Infrared technology is going to be used to uncover what is left of the original painting and hopefully bring it back to it's former glory - and incredible value.
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