Fideograph · Church History

The Ecumenical Councils

Twenty-one councils across sixteen centuries. Every major heresy faced. Every definition made. The same mechanism, the same authority, every time.

21 councils · AD 325 – 1965 · 1,640 years
AD 325 - AD 787 · Seven Councils

The First Millennium

The Christological controversies: defining the Trinity and the nature of Christ.

325
I
Ecumenical

Council of Nicaea I

Nicaea, Bithynia (modern Turkey)

⚔ Heresy
Arianism
“The Son is a creature, the first and greatest of all created beings, but not co-eternal with the Father. There was a time when he was not.”
✓ Definition
The Son is consubstantial (homoousios) with the Father: co-eternal, co-equal, fully divine, not a creature. The Nicene Creed was promulgated as the universal confession of faith.
Cath Orth Luth Ref Bap Evan
381
II
Ecumenical

Council of Constantinople I

Constantinople · 150 bishops

⚔ Heresy
Pneumatomachianism (Macedonianism)
“The Holy Spirit is a creature, subordinate to the Father and the Son, not fully divine and not to be worshipped as God.”
✓ Definition
The Holy Spirit is the Lord and Giver of Life, who proceeds from the Father, who with the Father and the Son is worshipped and glorified. The Niceno-Constantinopolitan Creed was completed.
Cath Orth Luth Ref Bap Evan
431
III
Ecumenical

Council of Ephesus

Ephesus (modern Selçuk, Turkey)

⚔ Heresy
Nestorianism
“Christ is two separate persons, one divine and one human, joined by a moral union. Mary is the mother of the human person only (Christotokos), not the Mother of God.”
✓ Definition
Christ is one person with two natures, divine and human, united in a hypostatic union from the moment of conception. Mary is truly Theotokos (Mother of God) because she bore the one divine person of Christ in his human nature.
Cath Orth Luth Ref Bap Evan
451
IV
Ecumenical

Council of Chalcedon

Chalcedon, Bithynia (modern Kadıköy, Istanbul)

⚔ Heresy
Eutychianism (Monophysitism)
“Christ has only one nature after the Incarnation. His human nature was absorbed into or overwhelmed by his divine nature, so that only the divine nature remains.”
✓ Definition
Christ is one person in two natures, divine and human, without confusion, without change, without division, without separation. The two natures are preserved complete and intact in the one person. The Chalcedonian Definition used Leo's Tome as its theological basis.
Cath Orth Luth Ref Bap Evan
553
V
Ecumenical

Council of Constantinople II

Constantinople · 165 bishops

⚔ Heresy
Three Chapters (Nestorian-leaning writings)
“The writings of Theodore of Mopsuestia, certain works of Theodoret of Cyrrhus, and the letter of Ibas of Edessa were orthodox and should not be condemned, even though they contained Nestorian sympathies.”
✓ Definition
The Three Chapters were condemned. Theodore of Mopsuestia was anathematised personally. The Nestorian-leaning writings of Theodoret and the letter of Ibas were condemned while their persons were spared, since both had accepted Chalcedon.
Cath Orth Luth Ref Bap Evan
681
VI
Ecumenical

Council of Constantinople III

Constantinople · 174 bishops

⚔ Heresy
Monothelitism
“Christ has only one will, the divine will. His human nature had no distinct will of its own. To say Christ had two wills would divide his person.”
✓ Definition
Christ possesses two natural wills and two natural operations, divine and human, without division, without change, without separation, without confusion. The human will follows and is subject to the divine will, not by compulsion but freely.
Cath Orth Luth Ref Bap Evan
787
VII
Ecumenical

Council of Nicaea II

Nicaea, Bithynia · 350 bishops

⚔ Heresy
Iconoclasm
“The veneration of icons and sacred images is idolatry. Images of Christ, the saints, and the Virgin should be destroyed. True worship is spiritual and requires no material representation.”
✓ Definition
The veneration (proskynesis) of sacred images is lawful and holy, distinct from the worship (latreia) owed to God alone. Honour paid to an image passes to the prototype it represents. Icons of Christ, the Theotokos, angels, and saints are to be displayed and venerated.
Cath Orth Luth Ref Bap Evan
AD 869 - AD 1517 · Eleven Councils

The Medieval Councils

Church reform, disciplinary definitions, and the doctrines of purgatory and papal authority.

870
VIII
Ecumenical

Council of Constantinople IV

Constantinople · 102 bishops

⚔ Heresy
Photian Schism
“Photius, installed as Patriarch of Constantinople by imperial authority after the deposition of Ignatius, claimed his election was canonical and that Rome had no authority to judge the internal affairs of the Eastern patriarchate.”
✓ Definition
Photius was deposed. Ignatius was restored as Patriarch. The council reaffirmed that the Bishop of Rome holds primacy over all churches and that his judgment in patriarchal disputes is final. The council condemned interference by civil authorities in episcopal elections.
Cath Orth Luth Ref Bap Evan
1123
IX
Ecumenical

Council of Lateran I

Rome (Lateran Basilica) · 300 bishops

⚔ Heresy
Lay investiture
“Secular rulers have the right to appoint bishops and invest them with the symbols of spiritual authority. The emperor's role in selecting churchmen is a legitimate exercise of divinely granted temporal power.”
✓ Definition
Lay investiture is forbidden. Only ecclesiastical authority may confer spiritual office. The Concordat of Worms was ratified, distinguishing between the spiritual authority of the Church (appointment and consecration) and the temporal interests of the emperor (regalia).
Cath Orth Luth Ref Bap Evan
1139
X
Ecumenical

Council of Lateran II

Rome (Lateran Basilica) · 500 bishops

⚔ Heresy
Petrobrussianism, Arnoldism
“Peter of Bruys denied infant baptism, the Eucharistic sacrifice, the value of prayers for the dead, the veneration of crosses, and the need for church buildings. Arnold of Brescia denied that clergy could hold property and demanded apostolic poverty as a condition of valid ministry.”
✓ Definition
The errors of Peter of Bruys and Arnold of Brescia were condemned. Clerical marriages were declared invalid (not merely illicit). The schism of Anacletus II was formally ended. Simony, usury, and lay interference in church elections were condemned.
Cath Orth Luth Ref Bap Evan
1179
XI
Ecumenical

Council of Lateran III

Rome (Lateran Basilica) · 302 bishops

⚔ Heresy
Catharism, Waldensianism
“The Cathars taught a radical dualism: the material world was created by an evil god, the body is a prison, and the Catholic sacramental system (which uses material elements) is a deception. The Waldensians demanded that all Christians, including laypeople, should preach without ecclesiastical authorization.”
✓ Definition
The Cathars and Waldensians were condemned. The two-thirds majority rule for papal elections was established. Minimum ages for bishops (30) and parish priests (25) were set. Pluralism (holding multiple benefices) was forbidden.
Cath Orth Luth Ref Bap Evan
1215
XII
Ecumenical

Fourth Lateran Council

Lateran Palace, Rome · 412 bishops

⚔ Heresy
Catharism, Amalricianism
“The Cathars denied the goodness of creation and the efficacy of the sacraments. The Amalricians taught a pantheistic identification of God with creation and denied the real distinction between Creator and creature.”
✓ Definition
Defined transubstantiation as the term for the Eucharistic change. Required annual Confession and Communion (the Easter duty). Defined the doctrine of creation: one God created all things visible and invisible. Condemned pantheism. Issued 70 canons reforming nearly every aspect of Church life.
Cath Orth Luth Ref Bap Evan
1245
XIII
Ecumenical

Council of Lyon I

Lyon, France · 150 bishops

⚔ Heresy
Imperial interference in Church governance
“Emperor Frederick II claimed that secular rulers have authority over the Church within their territories, imprisoned bishops, seized Church property, and prevented free communication between bishops and Rome.”
✓ Definition
Frederick II was formally deposed as Holy Roman Emperor. His subjects were released from their oaths of allegiance. The council issued canons on judicial procedure, clerical discipline, and aid to the Holy Land.
Cath Orth Luth Ref Bap Evan
1274
XIV
Ecumenical

Council of Lyon II

Lyon, France · 500 bishops

⚔ Heresy
Denial of Filioque
“The Holy Spirit proceeds from the Father alone. The Western addition of 'and the Son' (Filioque) to the Nicene Creed is an unauthorised alteration and a theological error.”
✓ Definition
The Holy Spirit proceeds eternally from the Father and the Son, not as from two principles but as from one principle, not by two spirations but by one single spiration. The Greek delegation accepted this definition along with papal primacy and the seven sacraments.
Cath Orth Luth Ref Bap Evan
1312
XV
Ecumenical

Council of Vienne

Vienne, France · 300 bishops

⚔ Heresy
Free Spirit heresy (Beghards/Beguines errors)
“The soul can achieve such perfection in this life that it becomes incapable of sin. Those who reach this state need not obey the Church, fast, pray, or observe any moral law, because they have transcended the need for virtue.”
✓ Definition
The errors of the Free Spirit movement were condemned. The rational soul was defined as the substantial form of the human body (a philosophical definition with major theological consequences for the resurrection of the body). The Knights Templar were suppressed by papal provision.
Cath Orth Luth Ref Bap Evan
1415
XVI
Ecumenical

Council of Constance

Constance (Germany)

⚔ Heresy
Wycliffism, Hussitism, Conciliarism
“Wycliffe denied transubstantiation, papal authority, and the necessity of the institutional Church. Hus adopted many of Wycliffe's positions and added that a pope in mortal sin loses his authority. The Conciliarists claimed that a general council is superior to the pope.”
✓ Definition
Wycliffe (posthumously) and Hus were condemned. The Western Schism was ended by deposing or accepting the resignation of three rival claimants and electing Pope Martin V. The conciliarist decree Haec Sancta was issued but its binding status remains disputed.
Cath Orth Luth Ref Bap Evan
1439
XVII
Ecumenical

Council of Basel/Ferrara/Florence

Basel, Ferrara, Florence

⚔ Heresy
Conciliarism
“A general council derives its authority directly from Christ and is superior to the pope. The pope is bound to obey a general council in matters of faith, reform, and the ending of schism. The Basel faction declared Eugene IV deposed and elected an antipope.”
✓ Definition
The Decree for the Greeks (Laetentur Caeli) defined: the Filioque, the legitimacy of both leavened and unleavened bread for the Eucharist, purgatory, the beatific vision, and papal primacy with full jurisdiction over the universal Church. The conciliarist faction at Basel was condemned after it attempted to depose Eugene IV.
Cath Orth Luth Ref Bap Evan
1512
XVIII
Ecumenical

Council of Lateran V

Rome (Lateran Basilica) · 100 bishops

⚔ Heresy
Neo-Aristotelian mortality of the soul, Conciliarism (Council of Pisa)
“Some philosophers, following Averroist readings of Aristotle, taught that the rational soul is not individually immortal but returns to a universal intellect at death. The conciliarist Council of Pisa (1511) claimed authority to depose the pope.”
✓ Definition
Defined that the rational soul is individually immortal: each human soul is individually created by God, subsists after death, and will be reunited with its body at the resurrection. The conciliarist Council of Pisa was condemned as schismatic.
Cath Orth Luth Ref Bap Evan
AD 1545 - AD 1563 · One Council

The Reformation Era

The Council of Trent: defining the deposit of faith against Reformation denials.

1545
XIX
Ecumenical

Council of Trent

Trent (northern Italy) · 255 bishops

⚔ Heresy
Protestantism (multiple doctrines)
“Scripture alone is the sole rule of faith. Justification is by faith alone, not by works. There are only two sacraments (Baptism and the Lord's Supper). The Mass is not a sacrifice. Transubstantiation is a philosophical invention. The deuterocanonical books are not Scripture. Tradition has no binding authority.”
✓ Definition
Scripture and Tradition together constitute the single deposit of faith. Justification is by grace through faith, hope, and charity, involving genuine interior transformation. All seven sacraments were defined and their matter, form, and minister specified. Transubstantiation was reaffirmed. The deuterocanonical books were definitively included in the canon. The Vulgate was declared authentic for public use.
Cath Orth Luth Ref Bap Evan
AD 1869 - AD 1965 · Two Councils

The Modern Era

Defining papal infallibility and engaging modernity.

1869
XX
Ecumenical

First Vatican Council

Rome (Vatican) · 700 bishops

⚔ Heresy
Rationalism, Fideism, Gallicanism
“Rationalism: human reason alone can arrive at all truth without divine revelation. Fideism: faith requires no rational foundation and reason is irrelevant to belief. Gallicanism: the pope's authority is limited by the authority of national churches and general councils.”
✓ Definition
Defined papal infallibility: when the Roman Pontiff speaks ex cathedra (from the chair of Peter, defining a doctrine of faith or morals for the whole Church), he possesses that infallibility which Christ willed his Church to have. Also defined papal jurisdictional primacy: the pope has full, supreme, and universal jurisdiction over the whole Church, not merely a primacy of honour.
Cath Orth Luth Ref Bap Evan
1962
XXI
Ecumenical

Second Vatican Council

Rome (Vatican) · 2 bishops

✓ Definition
Issued 16 documents (4 constitutions, 9 decrees, 3 declarations) covering: divine revelation (Dei Verbum), the nature of the Church (Lumen Gentium), the liturgy (Sacrosanctum Concilium), the Church in the modern world (Gaudium et Spes), ecumenism, religious liberty, non-Christian religions, priestly formation, the laity, and missionary activity.
Cath Orth Luth Ref Bap Evan

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