The First Seven Ecumenical Councils

What It Covers

Everything Everywhere Daily examines the seven ecumenical councils held between 325 and 787 CE, explaining how bishops across the Roman world resolved disputes over Christ's nature, Mary's title, and icon veneration that permanently shaped Christianity's major denominations.

Key Questions Answered

• •Nicene Orthodoxy: The 325 Council of Nicaea established that Jesus shares identical substance with God the Father, rejecting Arius's subordinationist view. This Nicene theology is now accepted by Roman Catholics, Eastern Orthodox, Lutherans, Methodists, Presbyterians, most Baptists, and most Pentecostals — virtually all mainstream denominations.
• •Chalcedonian Split: The 451 Council of Chalcedon declared Christ exists as one person in two natures — fully divine and fully human — simultaneously. This precise wording caused the first permanent denominational fracture, separating Oriental Orthodox churches (Coptic, Armenian, Ethiopian, Eritrean, Syriac) that persist as distinct traditions today.
• •Council Collapse Factors: The seven-council era ended due to four converging pressures: political fragmentation after Rome's fall, self-created schisms limiting universal representation, Islamic conquest removing Alexandria, Antioch, and Jerusalem from Byzantine control, and the Greek-Latin theological divide culminating in the 1054 Great Schism.
• •Canon Origins: The non-ecumenical 393 Council of Hippo, held in North Africa, established the Bible's canonical book list by evaluating apostolic ties and existing church usage. Reaffirmed at Carthage shortly after, this regional council produced a decision with broader lasting impact than several ecumenical councils.