Hats perform many tasks, both practical and cultural: Sometimes they provide protection (in the case of Japanese Samurai warriors) or ritualistic importance (in the case of Anubis’ mask); other times they’re just attention-grabbers, as in the case of Elsa Schiaparelli’s famous shoe hat or Lady Gaga’s lobster. When looking through the history of head wear, the images of certain people become inseparable from their hats. How many times have you seen LL Cool J’s actual head? Can Santa be Santa without his red cap? What would the aughts look like without Ashton and his Von Dutch? Click through the slideshow for our list, which includes Audrey Hepburn, Che Guevara, ancient Chinese emperors’ hats, and more.