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Was Isleworth Mona Lisa painted before the Louvre’s version?

Swiss institute’s carbon-dating fails to answer question of attribution

The Isleworth Mona Lisa

The debate over the authenticity of the “Isleworth Mona Lisa” looks set to continue, following carbon-dating of the canvas. The copy of Leonardo’s masterpiece was greeted with some scepticism when it was unveiled in Geneva last autumn (The Art Newspaper, November 2012, p3), with most experts failing to support the claim that the work is by Leonardo.

The Swiss Federal Institute of Technology in Zurich has now dated a small sample taken from the canvas to between 1410 and 55, with a 95% probability it lies within this range.

The Mona Lisa Foundation, which is promoting research on the Isleworth copy, believes that Leonardo painted the picture shortly before he began the Louvre version in 1503. The Isleworth Mona Lisa got its name a century ago when it was bought by Hugh Blaker, a critic and restorer, who lived in the west London suburb. The foundation, which is convinced the portrait is by the master, argues that the early date for the canvas is strong evidence against the painting being a later copy.

However, it seems curious that Leonardo would have used canvas that was 45 to 90 years old, since the material was relatively cheap. The paints would have been much more expensive and the artist would have taken considerable time on a first version of the composition, making it surprising that he skimped on the support.

David Feldman, the vice president of the foundation, points out that Leonardo had used canvas while in Florence in the 1470s, and that he could have saved a piece that he later used for the earlier version of the Mona Lisa, which is on a “similar Rheims canvas”. He says Leonardo had to be frugal on his return to Florence in 1500 and “could not afford to pay rent”.

The foundation is planning to exhibit the Isleworth Mona Lisa in Singapore next year. The painting is then scheduled to go on to Hong Kong, Shanghai and Beijing, before going to America and Europe.

CORRECTION: This article was updated on 27 March. The earlier version misidentified the Mona Lisa Foundation as the owner of the Isleworth copy.

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30 Mar 13
3:11 CET


More than ludicrous -- Mona would never have worn that shade of lip gloss.

29 Mar 13
15:14 CET


By visual interpretation stylistically it shows that Isleworth Mona Lisa not a work by Leonardo. The Isleworth Mona Lisa is clearly, by its provenance, journalistic fodder and subject to suspicion.

29 Mar 13
15:16 CET


Quite ludicrous - Leonardo could never have painted hands so clumsily.

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