Many blessings to ya!!! Vasari also records that the king held Leonardo's head in his arms as he died, although this story may be legend rather than fact.
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In Venice, Leonardo was employed as a military architect and engineer, devising methods to defend the city from naval attack.
From 1510 to 1511 he collaborated in his studies with the doctor.
In 1482 Leonardo went to Milan at the behest of Lorenzo de' Medici in order to win favour with Ludovico il Moro, and the painting was abandoned.
In 2016, it was announced that DNA tests would be conducted to determine whether the attribution is correct.