One of the more famous examples of this is the strange object in the foreground of The Ambassadors by Hans Holbein the Younger [0], which resolves as a skull wh

One of the more famous examples of this is the strange object in the foreground of The Ambassadors by Hans Holbein the Younger [0], which resolves as a skull when viewed from the correct angle. https://upload.wikimedia.org/wikipedia/commons/8/88/Hans_Holbein_the_Younger_-_The_Ambassadors_-_Google_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/8/88/Hans_Hol...