The Eye of the Creator was a painting depicting Davros, the Creator of the Daleks.
The title referred to Davros's electronic eye, set in the middle of the Kaled scientist's forehead, which was viewed head-on in the painting. The "unknown" artist who painted the picture was believed to have been exterminated upon completion of the work.
A copy of the painting was used as an illustration by a book in which human historians attempted to reconstruct the complete, "untold" history of the Daleks thanks to a variety of historical records, legends and artwork. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)