Julianus, also known as Julian the Apostate, was a Roman Emperor who ruled from 361 to 363 AD. He is notable for his efforts to restore paganism in the Roman Empire after the rise of Christianity. Julianus was a philosopher and writer, known for his intellectual pursuits and his attempts to revive traditional Roman religious practices. During his reign, Julianus implemented policies that favored paganism and sought to diminish the influence of Christianity. His military campaign against the Persian Empire ended in his death in 363 AD, marking the end of his brief but impactful rule.