Leonardo da Vinci

A larger picture of this self-portrait is at 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 picture of this portrait by Melzi is at this link

A larger version of the picture is at this link

A larger version of the picture is at this link

Picture of Leonardo da Vinci
Leonardo portrayed as Plato by Raphael

Portrayed as Plato by Raphael
See THIS LINK

Picture of Leonardo da Vinci
Picture of Leonardo da Vinci

A bigger picture

Picture of Leonardo da Vinci