The Haltadefinizione website exhibits the highest definition photograph in the world, an amazing 16 billion pixel photograph of Leonardo Da Vinci’s Last Supper. That's more pixels than I can fathom, but all those pixels allow you to enlarge and observe any portion of this work of art. You can even magnify details as tiny as a one-millimeter square. Thank you, Randi, for sending this link (it’s a beauty!).