A once-dismissed Botticelli masterpiece has been rediscovered in Wales.

The 400-year-old painting made its way from the studio of the Florentine master to the collection of Welsh philanthropist Gwendoline Davies in Cardiff.

Portraying an image of the Madonna, the clumsily over-painted work was dismissed as a crude copy of the Italian artist’s style.

But experts working with BBC Four programme Britain’s Lost Masterpieces have found it to be an original work.

The painting we're looking at on #BritainsLostMasterpieces tonight was bought by the Davies sisters. From small beginnings they became Wales' greatest art collectors, as @EmmaDabiri discovers.https://t.co/E41urNbffw — Dr Bendor Grosvenor (@arthistorynews) November 13, 2019

Dr Bendor Grosvenor, co-presenter of the show, said: “When I first saw this painting in the museum store, I was struck by the extraordinary beauty of the Madonna’s face.

“Despite all the overpaint, parts of it reminded me of Botticelli’s most famous painting, the Birth Of Venus.

“I’m now convinced that Botticelli played an important part in its production, and am delighted it has once more gone on public display.”

The painting was bequeathed by Davies to the National Museum Cardiff, but its origins were doubted despite her belief it was a genuine Botticelli.

An x-ray of a doodle believed to have been made by Botticelli (BBC)

Expert analysis revealed marks unique to his studio, as well as a small doodle believed to be made by the artist himself.

Now proven to be the work of the Florentine, the painting will now be displayed in Cardiff.

Adam Webster, of the National Museum, said: “The results are striking and demonstrate the crucial role that conservation plays in the proper understanding of our heritage.

“We are delighted with and grateful for the results. The painting now sits beautifully in our galleries and I hope fans of the series will come and enjoy this masterpiece.”

BBC Four show Britain’s Lost Masterpieces can be viewed on the iPlayer.