Head of a young man [from 'The School of Athens']

A photograph of a drawing by Carlo Maratti now in the Royal Library at Windsor Castle (RCIN 904259). The drawing reproduces the head of the young man standing with folded arms to the left of Plato, at the top of the stairs in Raphael's 'School of Athens', painted in c.1509-10 in the Stanza della Segnatura in the Vatican.