Every Roman emperor has a few crazy stories under his belt, but none of them compare to the tales of Caligula. He’s the one Roman emperor historians are fairly sure was certifiably insane.
Six ancient Romans wrote about Caligula’s life, and every one of them agreed that he was completely off his rocker. They left stories about him that are so ridiculous that some people now insist that these events couldn’t possibly have happened. But that’s not because we have any evidence against them. Caligula’s life was just too crazy to be believed.