Caption: A detail of "The School of Athens" (1509) by Raphael (1483--1520) showing Plato (428/427--348/347 BCE) on the left and Aristotle (384--322 BCE) on the right.

The possibly involuntary model for Plato may have been Leonardo da Vinci (1452--1519).

Credit/Permission: Raphael (1483--1520), 1509 (uploaded to Wikipedia by User:Jacobolus, 2005) / Public domain.
Image link: Wikipedia: File:Sanzio_01_Plato_Aristotle.jpg.
File: Aristotle file: aristotle_plato.html.