Bycatch from my Snark hunt:
I discovered that “face” in Matthias Grünewald’s painting in 2018, but perhaps I was not the first one. I think that Gustave Doré found it already in the year 1863 when looking for inspiration from other artwork.
2018-09-21, updated 2019-02-19
(Bycatch from my Snark hunt: Doré probably recycled Doré.)