Andrew Wyeth "The Witching Hour", 1977
"Many people don't realize it, but the faint circular form near the middle is probably quite significant to the meaning of the painting. It's called a "daisy wheel" -- also known as a witch mark, hex sign, or hexafoil -- and they were carved into walls by people who feared witches or other misfortune. They are very charged symbols. And most people don't realize there were actually daisy wheels inscribed in the room where Wyeth painted in this scene. I've seen actual photos of them, and the room. It adds another amazing layer to this painting."