In the largest room in the White House hangs an iconic full-body portrait of George Washington renouncing a third term as president of the United States. There is a small but obvious spelling error contained within the portrait—and it's actually there for a very specific reason.
Before photoshop, there was painting. If you were commissioned to do art, you weren't about to paint an ugly portrait of the guy. So chins were lifted, skin was cleared, etc. and it gets sorta hard to tell what people really looked like. Until now.