Study for the Head of Saint Anne

The Study for the Head of Saint Anne is a drawing on paper executed in black stone by Leonardo da Vinci and preserved at Windsor Castle. It is a portrait of a woman, and is considered to be the preparatory study for the head of Saint Anne in the painting Sainte Anne, la Vierge et l'Enfant Jésus jouant avec un agneau (Saint Anne, the Virgin and the Child Jesus Playing with a Lamb) in the Louvre Museum.

Source: Wikipedia — Study for the Head of Saint Anne (CC BY-SA 4.0)