Elagabalus, also known as Heliogabalus, who ruled as Roman emperor from 218 to 222 AD, was known for his extravagant and scandalous behavior. He was accused of committing numerous atrocities, including murdering family members, engaging in incestuous relationships, and desecrating religious traditions, such as introducing the worship of the sun god Elagabalus to Rome. Elagabalus's reign was marked by instability and ended with his assassination at the age of 18.