Caligula

Caligula ruled as the third Emperor of the Roman Empire. His political and personal history of carnage is exceeded only by his infamous nephew, Emperor Nero. His eccentricities and fiscal excesses made him quite unpopular, ultimately leading to his assassination.

Caligula has become synonymous with brutality and utter chaos. It’s possible that his cruelty was related to a hot-headedness due to his age, much like the character Joffrey in Game of Thrones, but a serious illness was most likely responsible for his erratic behavior and violent tantrums, leading to his death at the hands of his own council members at age 25.