Mystery of Print Gallery Solved: Escher and the Droste Effect

Print Gallery by M.C. Escher with missing center filled in using the Droste Effect
Image courtesy of Universiteit Leiden

In May 1956, M.C. Escher finished his lithograph Print Gallery. In a letter to his son Arthur he wrote about this lithograph:

"The odd print I told you about last time is finished, though not yet printed. I don't think I have ever done anything as peculiar in my life. Among other things, it shows a young man looking with interest at a print on the wall of an exhibition that features himself. How can this be? Perhaps I am not far removed from Einstein's curved universe".

In Escher's original work, he left a blank space in the center. See how this spiral was continued using the Droste Effect.