By Robert Evans GENEVA (Reuters) - 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. "When we add these new findings to the wealth of
scientific and physical studies we already had, I believe anyone
will find the evidence of a Leonardo attribution overwhelming,"
said David Feldman vice-president of the foundation said. The
"Mona Lisa" in the Paris Louvre for over three centuries has
long been regarded as the only one painted by Leonardo -
although there have been copies - and claims for the Swiss-held
one were dismissed by some experts last year. But it also won
support in the art world, encouraging