Leonidas I
King of Sparta from c. 489 BC to 480 BC
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Updated 2026-05-29
Spartan king who made his last stand against the Persian invasion at Thermopylae in 480 BC, turning a military defeat into legendary last-man-standing mythology that outlasted empires.
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Leonidas I was king of the Ancient Greek city-state of Sparta. He was the son of king Anaxandridas II and the 17th king of the Agiad dynasty, a Spartan royal house which claimed descent from Heracles. Leonidas I ascended to the throne in c. 489 BC, succeeding his half-brother king Cleomenes I. He ruled jointly along with king Leotychidas II until his death in 480 BC, when he was succeeded by his son, Pleistarchus.
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Stable39.4
Composite of search demand, mentions, audience & graph footprint.
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Momentum1.1
Historical23.3
Source confidence60.0
Completeness60.0
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- WikidataHigh confidencewikidata · wikidata.org
- WikipediaHigh confidencewikipedia · en.wikipedia.org
- Pantheon 2.0High confidencedatabase · pantheon.world
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