The Horned Priest Ryogen
Another sketch from the Japanese art book I took out of the library. Also known as Tsuno Daishi, Ryogen was a priest in 10th century Japan who has become through legend a supernatural being. The founder of the warrior monks, he is believed to have great power to ward off evil, and his picture is hung on buildings for that purpose.
I read recently that many in China now hang pictures of Chairman Mao for the same reason.