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Heliogabalus was the nickname given to Marcus Aurelius Antoninus. This name was given to him because he was a devotee of the Syrian god El-Gabal, who was also known as Heliogabalus. Heliogabalus was a controversial figure, and his reign was marked by violence and instability. He was eventually assassinated by his own guards, and his body was thrown into the Tiber River.