New tests on a painting billed as the original version of the Mona Lisa, Leonardo da Vinci's 15th century portrait, have produced fresh proof that it is the work of the Italian master, a Swiss-based art foundation said on Wednesday. The tests, one by a specialist in "sacred geometry'' and the other by the Swiss Federal Institute of Technology in Zurich, were carried out in the wake of the Geneva unveiling of the painting, the "Isleworth Mona Lisa," last September. ...
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