What is the name of the painting of the two bulls: Light and Darkness mentioned in Burned and Awakened?

I KNOW I've seen this painting before lectura the books. It was supposed to be a painting of the two bulls in an epic battle.
However, I've scoured the net for any paintings about bulls o Light and Darkness with no luck.
I could almost swear I've seen the painting mentioned, but I can't remember where, when, o even the name of the artist.
Is there ANYONE who knows about the painting in real life, o am I just going crazy, thinking I've seen it?
o.o