The Ambassadors (1533) is a painting by Hans Holbein the Younger in the National Gallery, London. As well as being a double portrait, the painting contains a still life of several meticulously rendered objects, the meaning of which is the cause of much debate. The most notable and famous of Holbein's symbols in the work is the skewed skull, rendered in anamorphic perspective, which is placed in the painting's bottom centre. It is meant to be a visual puzzle as the viewer must approach the painting nearly from the side to see the form morph into an accurate rendering of a human skull.Image: Google Art Project