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When were the ancient Olympic Games abolished?

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Map of southeastern Europe highlighting Greece and marking the location of Olympia with a red star, indicating its status as a World Heritage Site. Olympia is shown in the western part of the Peloponnese peninsula, surrounded by neighboring countries and nearby seas including the Ionian, Aegean, and Mediterranean. — Olympia Olympia was declared a UNESCO World Heritage site in 1989.

The ancient Olympic Games were finally abolished about 394 CE by the Roman emperor Theodosius I or his son. The decision to end the games was driven by the festival's pagan associations, as the Roman Empire transitioned away from traditional religious practices.12