An Italian museum plans to carry out DNA tests on a lock of hair it believes might have belonged to the Renaissance artist Leonardo da Vinci, who died 500 years ago this month. However, some experts have thrown doubt on the exercise, saying the hair almost certainly did not belong to the Italian master, while credible DNA testing may prove impossible. Da Vinci died in May 1519 and was buried at the Chateau dAmbroise near the French city of Tours. According to Reuters, the castle was badly damaged following the French Revolution of 1789 and many graves were destroyed, including that of Leonardo. Alessandro Vezzosi, director of the Ideal Leonardo da Vinci museum in Vinci, the artists hometown in Tuscany, said the strand of hair was collected from the site in 1863 by a man tasked by a royal commission to try to locate Leonardos remains. "In 1925, an American collector bought this relic in Paris ... Later, before dying aged 95, he sold it on to another American collector, who contacted us," Vezzosi said. He said the museum planned to extract DNA from the sample and compare it with the DNA from a group of descendants that the museum says it identified in 2016, using genealogical records. But some experts are already pouring cold water on the whole exercise. The artist himself never married and left no direct heirs, so the DNA will be checked against that of the descendants that Vezzosi said had been found by following the family trees of other children born to Leonardos father. The chance of recreating an unbroken male line over 500 years is extremely unlikely.