An "Eye" on Art

Austrians and Germans like to add charming frescoes to the outside of their homes, often something having to do with the town's history, or something otherwise sentimental. A house in Lower Austria has Indians and buffaloes, because the owner liked stories of the Wild West.

I spotted this painting on a house in a German village. What appears to be a fan or a socket of some kind in the left corner looks to me like a little eye looking down on the painting.