Three-Chapter Controversy

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The Three-Chapter Controversy, a phase in the Chalcedonian controversy, was an attempt to reconcile the non-Chalcedonians of Syria and Egypt with Chalcedonian Christianity, following the failure of the Henotikon. The Three Chapters (τρία κεφάλαια, tría kephálaia) that Emperor Justinian I anathematized were:

1. The person and writings of Theodore of Mopsuestia
2. Certain writings of Theodoret of Cyrus
3. The letter of Ibas of Edessa to Maris