Section 04: Chalcedon (451)
The Fourth Ecumenical Council received Leo’s Tome to the acclamation “Peter has spoken through Leo” — but only after the fathers had examined it against the letters of Cyril. This section, governed by Methodology §4, sets out both what that reception meant and the longest-lasting schism it produced: the rejection of Chalcedon and the Tome by the miaphysite churches of the East.
Tradition: Pan-Orthodox (Church Father / Latin)
Contents
| File | Title | Scope |
|---|---|---|
| the-council-and-the-tome.md | The Council and the Tome | Flagship (§4). The council convened by Marcian (451); the reading of the Tome and the “Peter has spoken through Leo” acclamation from the acta; the central point that the fathers scrutinized the Tome against Cyril’s letters — the doubts of the Illyrian and Palestinian bishops, resolved by the deacon Aetius — so that the Tome’s authority rests on its consonance with Cyril, not on raw papal fiat; the Roman maximal reading and the Orthodox conciliar reading, both sourced; the Definition of Chalcedon. |
| the-non-chalcedonian-rupture.md | The Non-Chalcedonian Rupture | (§4 both-sides.) The rejection of Chalcedon and Leo’s Tome by the Coptic, Syriac, Armenian, Ethiopian, Eritrean, and Malankara churches; why the Tome specifically was the offense; Severus of Antioch’s critique of “each form does what is proper” as splitting Christ into two agents; the permanent division; the modern Agreed Statements (1989, 1990) and their incompleteness — with the miaphysite/monophysite distinction respected, the Definition of Chalcedon standing as the dogma of the Fourth Ecumenical Council, the miaphysite critique reported accurately in its own terms, and no verdict rendered on the unfinished questions of the modern dialogue. |
How to Use
- Read The Council and the Tome first. It is the flagship: it establishes both the height of Leo’s vindication and the conciliar conditions of it.
- Then read The Non-Chalcedonian Rupture, the section’s both-sides file, which holds to Methodology §4: the Definition and the Tome stand as the faith of the Fourth Ecumenical Council, the miaphysite reading is reported in its own terms, and the contested outcome of the modern dialogue is left both-sides.
Cross-References
- The Tome to Flavian — the document the council received.
- Leo and Canon 28 — the other, contested act of the same council.
- St. Cyril of Alexandria, especially its non-Chalcedonian flagship — the Father claimed by both families.
- Ecumenical Councils — Chalcedon in the conciliar framework.
- Methodology — §4, the both-sides method governing this section.
References
Full citations are at the foot of each file. The council acta are cited from ACO tom. II and the translation of Price & Gaddis, The Acts of the Council of Chalcedon (TTH, 2005); the Tome as Leo, Ep. 28; the secondary scholarship principally Sellers, Grillmeier, Meyendorff, Wessel, and (for the Oriental Orthodox reading) the 1989/1990 Agreed Statements.