The seven councils of 325 to 787, each traced from the claim that provoked it to the answer it gave, with the Scriptures both sides argued from.
The Seven Councils
Scripture is the standard. These councils are history: a record of what was decided, to be tested against the Scriptures.
Seven gatherings of bishops, from 325 to 787. Each row starts with the claim that provoked a council, stated in its holders' own terms, then the council, then the answer it gave. Choose any part of a row to read it.
Which council answered this claim?
The Line and the Branches
Where each church body stands today.
The Nature of God
The views on the Godhead, tested against Scripture.
Should There Be a Pope?
Both sides of the papacy question, Honorius included.
NPNF2-14, The First Council of Nice: title page
NPNF2-14, The Creed of Nice (325)
NPNF2-14, The First Council of Constantinople: title page
NPNF2-14, First Council of Constantinople: Historical Introduction
NPNF2-14, The Holy Creed Which the 150 Holy Fathers Set Forth
NPNF2-14, First Council of Constantinople: Canon I
NPNF2-14, The Council of Ephesus: title page
NPNF2-14, St. Cyril's Second Letter to Nestorius (read at Ephesus)
NPNF2-14, Council of Ephesus: Extracts from the Acts, Session I (continued)
NPNF2-14, St. Cyril's Third Letter to Nestorius
NPNF2-14, The Council of Chalcedon: title page
NPNF2-14, The Definition of Faith of the Council of Chalcedon
NPNF2-14, The Second Council of Constantinople: title page
NPNF2-14, Second Council of Constantinople: Historical Introduction
NPNF2-14, The Capitula of the Council (553)
NPNF2-14, The Third Council of Constantinople: title page
NPNF2-14, Third Council of Constantinople: Historical Introduction
NPNF2-14, The Definition of Faith (680–681)
NPNF2-14, Excursus on the Condemnation of Pope Honorius
NPNF2-14, The Second Council of Nice: title page
NPNF2-14, Second Council of Nice: Introduction
NPNF2-14, Epitome of the Definition of the Iconoclastic Conciliabulum (754)
NPNF2-14, The Decree of the Second Council of Nice
Schaff, Creeds of Christendom II: Symbolum Nicænum, A.D. 325 (Greek text)
Schaff, Creeds of Christendom II: Forma Recepta Ecclesiæ Orientalis, A.D. 381 (Greek text)
Schaff, Creeds of Christendom II: Symbolum Chalcedonense (Greek text and notes)
Schaff, Creeds of Christendom II: Symbolum Constantinopolitanum Tertium (Greek text)
Athanasius, Discourse I Against the Arians (NPNF2-4, New Advent)
Athanasius, Discourse II Against the Arians (NPNF2-4, New Advent)
Athanasius, Discourse III Against the Arians (NPNF2-4, New Advent)
Gregory Nazianzen, Oration 31, On the Holy Spirit (NPNF2-7, New Advent)
Gregory Nazianzen, Letter 101, To Cledonius Against Apollinarius (NPNF2-7, New Advent)
Nestorius, Second Letter to Cyril (Early Church Texts, public-domain translation)
Leo the Great, Letter 28, the Tome to Flavian (NPNF2-12, New Advent)
John of Damascus, On Holy Images, tr. Mary H. Allies, 1898 (Project Gutenberg 49917)