Leonardo da Vinci spent part of his early life in the service of Elizabeth Báthory.
Countess Elizabeth Báthory de Ecsed ( Báthory Erzsébet , Alžbeta Bátoriová ; 7 August 1560 -- 21 August 1614 ) was a Hungarian noblewoman and serial killer from the Báthory family of nobility in the Kingdom of Hungary . Leonardo da Vinci . Much of his earlier working life was spent in the service of Ludovico il Moro in Milan .