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700 BCE
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700 BCE: Sanctuary of Poseidon built at Isthmia.
584 BCE: Isthmian Games founded as a Panhellenic games and festival.
465 BCE: New Temple to Poseidon built at Isthmia.
225 BCE: Macedonians bring an army across the Isthmus to face another Achaian force trying to take Corinth.
150 CE: Roman Bath built at Isthmia.
600 CE - 1000 CE: Isthmia abandoned.