COUNCIL Apostolic & Patristic (30–451 AD) May – August 325 AD Inter-Confessional/Academic (Apostolic)

First Council of Nicaea (325 AD)

First Ecumenical Council, condemned Arius, and confessed Christ as homoousios

The First Council of Nicaea was convened by Emperor Constantine I with ~318 bishops, condemning the heresy of Arius (who claimed the Son was created: 'there was when he was not') and formulating the original Creed of Nicaea, affirming that the Son is 'true God from true God, begotten not made, of one essence with the Father' (homoousios to Patri).

Geographical Center: Nicaea, Bithynia (Iznik, Turkey) Historical Catalyst: Arian controversy sparked by Arius of Alexandria

Historical Context & Significance

Nicaea also established the calculation of Pascha/Easter independent of the Jewish Passover, recognized the special administrative prerogatives of Alexandria, Rome, and Antioch (Canon 6), and set twenty canonical regulations for church discipline.

Genealogical Lineage & Splits

Root Origin

This movement or council is an early root foundation with no preceding parent split in the dataset.

Direct Offshoots & Descendants (1)

council

First Council of Constantinople (381 AD)

The First Council of Constantinople, convoked by Emperor Theodosius I with 150 orthodox bishops, expanded the Nicene Creed into the definitive Niceno-Constantinopolitan Creed, explicitly confessing the full divinity of the Holy Spirit as 'the Lord, the Giver of Life, who proceeds from the Father, who with the Father and the Son is worshiped and glorified'.

Theological & Hermeneutical Coordinates

Soteriology Only One Who is Fully God Can Redeem and Deify Humanity

Hermeneutic Apostolic Rule of Faith Employing Philosophical Precision (Homoousios)

Ecclesiology & Sacraments Ecumenical Conciliar Authority and Universal Paschal Uniformity

Eschatology Bodily Resurrection and World to Come

Primary Scripture Proof-Texts

Key biblical passages central to this tradition's exegesis and historical debates.

NT.JHN.1.1 → NT.JHN.10.30 → NT.COL.1.15 → NT.HEB.1.3 →

Connected Theological Perspectives & Debates

Christology & Trinity NT.JHN.1.14, NT.PHP.2.5, NT.COL.2.9

Christology: Two Natures & the Hypostatic Union

Universal confession across Chalcedonian and Non-Chalcedonian communions that Jesus Christ is fully God and fully man, born of the Virgin Mary, without sin.

Hermeneutics & Canon OT.GEN.1.1, OT.EXO.20.11, NT.COL.1.16

Creation Days & Biblical Cosmology

Universal Christian confession that God Almighty is the sole Creator of all things visible and invisible out of nothing (*creatio ex nihilo*).

Hermeneutics & Canon NT.2TI.3.16, NT.2PE.1.20, NT.JHN.10.35

Biblical Inerrancy vs. Infallibility

Universal Christian confession that Holy Scripture is divinely inspired, supremely authoritative, and completely trustworthy for knowing God and receiving salvation.

Eschatology & Millennium NT.ROM.11.1, NT.GAL.6.16, NT.EPH.2.14

Israel & the Church: Supersession vs. Dispensationalism

Universal confession that Gentiles are grafted into the covenant promises through faith in Jesus Christ, the true Seed of Abraham.

Christian Living & Ethics OT.EXO.20.4, NT.COL.1.15, OT.EXO.25.18

Images, Icons & the Second Commandment

Universal confession that worship (*latreia*) belongs to God alone and that gross physical idols of false gods are strictly abhorred.