The ancient Olympic Games (Ancient Greek: τὰ Ὀλύμπια, ta Olympia), or the ancient Olympics, were a series of athletic competitions among representatives of city-states and one of the Panhellenic Games of ancient Greece. They were held at the Panhellenic religious sanctuary of Olympia, in honor of Zeus, and the Greeks gave them a mythological origin. The originating Olympic Games are traditionally dated to 776 BC. The games were held every four years, or Olympiad, which became a unit of time in historical chronologies.

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