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A physical sign of stroke sequel on the skeleton of Leonardo da Vinci?

Scholars generally state that Leonardo da Vinci died in 1519 at age 67 of recurrent stroke. One finding may confirm this medical hypothesis: in 1863, the grave of Leonardo was discovered in the Saint-Florentin chapel of Amboise (France), with the skeleton of an old man, tiny fragments of white hair, 8 remaining teeth, and the upper right arm blocked over the skull1 (figure).