Leonardo da Vinci
A larger picture of this self-portrait is at this link
A larger picture of this portrait by Melzi is at this link
A larger version of the picture is at this link
Portrayed as Plato by Raphael
See THIS LINK
A larger picture of this self-portrait is at this link
A larger picture of this portrait by Melzi is at this link
A larger version of the picture is at this link
Portrayed as Plato by Raphael
See THIS LINK