Sosigenes of Alexandria
Ancient Greek astronomer
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The astronomer Julius Caesar trusted to fix time itself. When Rome's calendar had drifted forty-seven days out of sync with the seasons, Sosigenes was called in to rebuild it from scratch.
About
Sosigenes worked in Alexandria during the 1st century BC, when the city was the intellectual center of the ancient world. Caesar summoned him to Rome in the mid-40s BC to solve a political and agricultural crisis: the Roman calendar had become so misaligned that harvest festivals fell in the wrong seasons. Sosigenes designed what became the Julian calendar, introducing the 365-day year with a leap day every four years. His system governed Europe for over sixteen centuries. Almost nothing else about his life survives.
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- WikidataHigh confidencewikidata · wikidata.org
- WikipediaHigh confidencewikipedia · en.wikipedia.org
- Pantheon 2.0High confidencedatabase · pantheon.world
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