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The Great Schism Explained

How and why the Eastern Orthodox and Roman Catholic churches divided — the Filioque, papal authority, the road to 1054, and the sack of Constantinople in 1204 — stated fairly to both sides. Members download the full explainer.

More than a single year

The "Great Schism" is usually dated to 1054, but the split was the result of centuries of theological, political, and cultural drift — and it deepened for centuries after.

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  • The deep causes: the Filioque, papal authority, language, politics, liturgy
  • The road to 1054 — and why 1204 may have mattered more
  • Each side's view, stated as that side would state it

What's in the full member PDF

  • A full timeline from 330 to the 1965 lifting of the anathemas
  • A cause-by-cause comparison of East and West
  • An honest note on what 1054 actually was
  • Study questions and sources

Members: download the full explainer below. Support for $1/month or more to unlock the library.

Topic: Christian Orthodoxy