Santa Claus in the 1910s and 1920s had largely come into focus as the jolly, bearded, happy soul we would recognize today, but artists still occasionally tweaked the color of Santa's robes or the amount of girth they added around the middle. By the 1860s, famous cartoonist Thomas Nast had turned Santa Claus into a fully human-sized character and given him a home at the North Pole. Explore images of Santa and learn about his role in advertising history from our National Museum of American History.