# Eastern Orthodoxy · The Canon · The Atlas · The Congregation of Tomorrow

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The Canon · No. 049
Eastern Orthodoxy
The Orthodox Church
1054 CE (formal schism) – present · Abrahamic · Living · Russia, Greece, Ukraine, Romania, Serbia, Bulgaria, Georgia, Middle East
V. THE MEDIEVAL WORLD — c.500 – 1500 CE
### How many
### Who began it
### What it is for
### What it worships
### What it holds
### What it does
### After death
### Its texts
### Its branches
### Of note
### Its timeline
- 330 CE Constantinople founded as the new capital.
- 726–843 CE Iconoclasm, twice imposed and twice defeated; the Triumph of Orthodoxy in 843 is still celebrated annually.
- 863 CE Cyril and Methodius begin the Slavic mission, inventing an alphabet so that scripture could be read in the vernacular.
- 988 CE Rus converts under Vladimir.
- <strong>1054 CE</strong> Mutual excommunications between papal legates and the patriarch of Constantinople. The conventional date of the schism, though the real separation was gradual.
- <strong>1204 CE</strong> The Fourth Crusade sacks Constantinople. Western crusaders loot the greatest Christian city in the world and desecrate Hagia Sophia. This, far more than 1054, made the division permanent in Orthodox memory.
- 1341–1351 CE Palamite councils affirm hesychasm and the essence-energies distinction.
- 1439 CE Council of Florence attempts reunion; it is repudiated by the Orthodox faithful.
- 1453 CE Constantinople falls to the Ottomans; the patriarchate continues under Ottoman administration.
- 1589 CE Moscow patriarchate established; Russia claims the mantle of the Third Rome.
- 1917–1988 CE Soviet persecution. Tens of thousands of clergy killed; the church survives and revives after 1988.
- 2018–2019 CE Constantinople grants autocephaly to the Orthodox Church of Ukraine; Moscow breaks communion. The largest Orthodox rupture in centuries, and it is about jurisdiction and war, not doctrine.
### Sources
Not yet checked against named sources. This entry is the house's reading; until it is checked, treat each claim as unverified. Correct it, with a source.
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