A long time ago I found a small pixelated photograph on the internet that stated it was a portrait of Plato.  Alternatively, it can be identified as other philosophers without the text, The face of the portrait is idealized because the original photograph did not contain enough detail.  Plato is written in modern greek.  I finally completed the drawing this year after starting it many years ago.   If you are the owner of the original photograph contact me so that I can acknowledge the reference.