# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/sosigenes-of-alexandria
# Generated: 2026-08-16T06:45:15.209Z

schema: https://schema.org/Person
url: "https://fame.am/person/sosigenes-of-alexandria"
name: "Sosigenes of Alexandria"
slug: "sosigenes-of-alexandria"
description: "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."
tagline: "Ancient Greek astronomer"
gender: "male"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "-100"
deathDate: "-100"
livingStatus: "DECEASED"
scores:
  popularity:           52
  momentum:             0
  historical:           22.11037066666667
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  45
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
tags:
  - name: "Scientists"
    slug: "scientists"
  - name: "Scientist"
    slug: "scientist"
  - name: "Astronomy"
    slug: "astronomy"
  - name: "Philosophy"
    slug: "philosophy"
  - name: "Mathematics"
    slug: "mathematics"
  - name: "Ancient History"
    slug: "ancient-history"
sources:
  - url: "https://www.wikidata.org/wiki/Q316867"
    title: "Wikidata"
    type:  "WIKIDATA"
  - url: "https://en.wikipedia.org/wiki/Sosigenes_of_Alexandria"
    title: "Wikipedia"
    type:  "WIKIPEDIA"
  - url: "https://pantheon.world/profile/person/Sosigenes%20of%20Alexandria"
    title: "Pantheon 2.0"
    type:  "DATABASE"
  - url: "https://az.wikipedia.org/wiki/Sosigines"
    title: "Sosigines"
    type:  "WIKIPEDIA"
  - url: "https://bg.wikipedia.org/wiki/%D0%A1%D0%BE%D0%B7%D0%B8%D0%B3%D0%B5%D0%BD"
    title: "Созиген"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Sos%C3%ADgenes_(fil%C3%B2sof)"
    title: "Sosígenes (filòsof)"
    type:  "WIKIPEDIA"
  - url: "https://cs.wikipedia.org/wiki/S%C3%B3sigenes_z_Alexandrie"
    title: "Sósigenes z Alexandrie"
    type:  "WIKIPEDIA"
  - url: "https://da.wikipedia.org/wiki/Sosigenes"
    title: "Sosigenes"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Sosigenes_aus_Alexandria"
    title: "Sosigenes aus Alexandria"
    type:  "WIKIPEDIA"
  - url: "https://el.wikipedia.org/wiki/%CE%A3%CF%89%CF%83%CE%B9%CE%B3%CE%AD%CE%BD%CE%B7%CF%82_%CE%BF_%CE%91%CE%BB%CE%B5%CE%BE%CE%B1%CE%BD%CE%B4%CF%81%CE%B5%CF%8D%CF%82"
    title: "Σωσιγένης ο Αλεξανδρεύς"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Sosigenes_(astronomer)"
    title: "Sosigenes (astronomer)"
    type:  "WIKIPEDIA"
  - url: "https://eo.wikipedia.org/wiki/Sosigeno_el_Aleksandrio"
    title: "Sosigeno el Aleksandrio"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Sos%C3%ADgenes"
    title: "Sosígenes"
    type:  "WIKIPEDIA"
  - url: "https://et.wikipedia.org/wiki/Sosigenes_Aleksandriast"
    title: "Sosigenes Aleksandriast"
    type:  "WIKIPEDIA"
  - url: "https://eu.wikipedia.org/wiki/Sosigenes_Alexandriakoa"
    title: "Sosigenes Alexandriakoa"
    type:  "WIKIPEDIA"
  - url: "https://fa.wikipedia.org/wiki/%D8%B3%D9%88%D8%B3%DB%8C%DA%AF%D9%86%D8%B3"
    title: "سوسیگنس"
    type:  "WIKIPEDIA"
  - url: "https://fi.wikipedia.org/wiki/Sosigenes_Aleksandrialainen"
    title: "Sosigenes Aleksandrialainen"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Sosig%C3%A8ne_d'Alexandrie"
    title: "Sosigène d'Alexandrie"
    type:  "WIKIPEDIA"
  - url: "https://ga.wikipedia.org/wiki/Sosais%C3%A9anas_Chathair_Alastair"
    title: "Sosaiséanas Chathair Alastair"
    type:  "WIKIPEDIA"
  - url: "https://gl.wikipedia.org/wiki/Sos%C3%ADxenes_(fil%C3%B3sofo)"
    title: "Sosíxenes (filósofo)"
    type:  "WIKIPEDIA"
  - url: "https://hu.wikipedia.org/wiki/Szoszigen%C3%A9sz"
    title: "Szoszigenész"
    type:  "WIKIPEDIA"
  - url: "https://id.wikipedia.org/wiki/Sosigenes_dari_Aleksandria"
    title: "Sosigenes dari Aleksandria"
    type:  "WIKIPEDIA"
  - url: "https://it.wikipedia.org/wiki/Sosigene_di_Alessandria"
    title: "Sosigene di Alessandria"
    type:  "WIKIPEDIA"
  - url: "https://ja.wikipedia.org/wiki/%E3%82%BD%E3%82%B7%E3%82%B2%E3%83%8D%E3%82%B9"
    title: "ソシゲネス"
    type:  "WIKIPEDIA"
  - url: "https://ka.wikipedia.org/wiki/%E1%83%A1%E1%83%9D%E1%83%96%E1%83%98%E1%83%92%E1%83%94%E1%83%9C%E1%83%94_%E1%83%90%E1%83%9A%E1%83%94%E1%83%A5%E1%83%A1%E1%83%90%E1%83%9C%E1%83%93%E1%83%A0%E1%83%98%E1%83%94%E1%83%9A%E1%83%98"
    title: "სოზიგენე ალექსანდრიელი"
    type:  "WIKIPEDIA"
  - url: "https://lb.wikipedia.org/wiki/Sosigenes_vun_Alexandria"
    title: "Sosigenes vun Alexandria"
    type:  "WIKIPEDIA"
  - url: "https://als.wikipedia.org/wiki/Sosigenes_aus_Alexandria"
    title: "Sosigenes aus Alexandria"
    type:  "WIKIPEDIA"
  - url: "https://ar.wikipedia.org/wiki/%D8%B3%D9%88%D8%B3%D9%8A%D8%AC%D9%8A%D9%86%D9%8A%D8%B3"
    title: "سوسيجينيس"
    type:  "WIKIPEDIA"

# bio (long form, separated for readability)
bio: |
  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.