The Council of Chalcedon was an ecumenical council that took place from October 8–November 1, 451 at Chalcedon (a city of Bithynia in Asia Minor) which today is part of the city of Istanbul on the Asian side of the Bosphorus and known as the district of Kadıköy. It is the fourth of the first seven Ecumenical Councils in Christianity, and is therefore recognized as infallible in its dogmatic definitions by the Roman Catholic and Eastern Orthodox churches. It repudiated the Eutychian doctrine of monophysitism, and set forth the Chalcedonian Creed, which describes the full humanity and full divinity of Jesus, the second person of the Holy Trinity.
However, the works of two long dead Antiochean theologians, Diodorus of Tarsus and Theodore of Mopsuestia were at this time translated into Syriac. By the intervention of Patriarch Proclus of Constantinople, the two theologians were condemned throughout the East, but this situation would later provide the material for the Second Council of Constantinople some hundred years later.
Cyril had taught that "There is only one physis, since it is the Incarnation, of God the Word." Cyril had apparently understood the Greek word physis to mean approximately what the Latin word persona (person) means, while most Greek theologians would have interpreted that word to mean natura (nature). Thus, many understood Eutyches to be advocating a sort of reversal of Arianism -- where Arius had denied the divine nature of Jesus, Eutyches seemed to be denying his human nature. (Cyril's orthodoxy was not called into question, since the Union of 433 had explicitly spoken of two physes in this context.)
Pope Leo I, from Rome, wrote that Eutyches' error seemed to be more from a lack of skill on the matters than from malice. Further, his side of the controversy tended not to enter into arguments with their opponents, which prevented the misunderstanding from being uncovered. Nonetheless, due to the high regard in which Eutyches was held (second only to the Patriarch of Constantinople in the East), his teaching spread rapidly throughout the east.
In November 447, during a local synod in Constantinople, Eutyches was denounced as a heretic by the bishop of Dorylaeum, Eusebius, with the demand that he be removed from his office. Flavian of Constantinople did not wish to consider the matter, due to the great prestige that Eutyches enjoyed, but finally relented, and Eutyches was condemned as a heretic by the synod. However, the emperor Theodosius II and the Pope of Alexandria, Dioscorus, did not accept the decision of the synod because Eutyches had repented and confessed his orthodoxy. Dioscorus held his own synod reinstating Eutyches, and the emperor called a council to be held in Ephesus in 449, inviting Pope Leo I, who agreed to be represented by three legates.
Theodosius' council convened on August 8, 449, with some 130 bishops in attendance. Dioscorus presided by command of the emperor. The emperor denied the vote to any bishop who had voted in Eutyches' deposition two years earlier. As a result, there was a near-unanimous support for Eutyches, and Flavian was himself deposed and exiled. He died shortly thereafter. The papal legates left with a letter for the pope from Flavian, and in a second session, without papal representation, several more bishops were deposed, including Ibas of Edessa, Irenaeus of Tyre (a close personal friend of Nestorius), Domnus of Antioch, and Theodoret.
The decisions of this council threatened schism between the East and the West, since they went plainly against the papal declaration, although it was never read. The pope dubbed this council a "synod of robbers" — Latrocinium — and refused to accept its pronouncements. His letter was not read at the council and the papal legates left with it as well and it is for this reason that he called it so.
Marcian agreed to hold a new council, but not in Italy, as the pope had requested, but rather in the East, but he invited the pope to preside in person. He had the exiled bishops returned to their dioceses, and had the body of Flavian brought to the capital to be buried in honor.
The council was called to meet at Nicaea, but was moved at the last moment to Chalcedon, where the council opened on October 8, 451. The papal legate Paschanius was sent to preside. Leo himself sent a letter to the council, condemning the work of the "latrocinium" and indicating that the correct doctrine about the Incarnation could be found in his previous letter to Flavian.
Attendance at this council was very high, some 500 bishops. Paschanius refused to give Dioscorus (who had carried out an excommunication of the pope in the period leading up to the council) a seat at the council, and as a result, he was moved to the nave of the church. Paschanius further ordered the reinstatement of Theodoret and that he be given a seat, but this move caused such an uproar among the council fathers, that Theodoret also sat in the nave, though he was given a vote in the proceedings, which began with a trial of Dioscorus.
Marcian wished to bring proceedings to a more speedy end, and asked the council to make a pronouncement on the doctrine of the Incarnation before continuing the trial. The council fathers, however, felt that no new creed was necessary, and that the doctrine had been laid out clearly in Leo's letter to Flavian, by then called "The Tome"*. The second day of the council ended with shouts from the bishops, "It is Peter who says this through Leo. This is what we all of us believe. This is the faith of the Apostles. Leo and Cyril teach the same thing."
The council continued with Dioscorus' trial, but he refused to appear before the assembly. As a result, he was condemned unanimously (though the Egyptian bishops seem to have been intimidated in this), and all of his decrees were declared null. Marcian responded by exiling Dioscorus. All of the bishops were then asked to sign their assent to the Tome, but a group of thirteen Egyptians refused, saying that they would assent to "the traditional faith". As a result, the emperor's commissioners decided that a creed would indeed be necessary and presented a text to the fathers. No consensus was reached, and indeed the text has not survived to the present.
Paschanius threatened to return to Rome to reassemble the council in Italy. Marcian agreed, saying that if a clause were not added to the creed supporting Leo's doctrine, the bishops would have to relocate. The bishops relented and added a clause, saying that, according to the decision of Leo, in Christ there are two natures united, inconvertible inseparable [natures.
The work of the council was completed by a series of 30* disciplinary canons.
Recent years have brought about a certain amount of dialogue between other Christians and the Oriental Orthodox. Some Oriental Orthodox bishops have indicated that the difference in doctrine was never more than a misunderstanding and have since reintegrated in the Catholic or Eastern Orthodox churches. Formerly schismatic Eastern Rite denominations returning to communion with Rome since Chalcedon include elements of the Alexandrian, Syriac and Armenian churches.
The most comprehensive confession of the Person of Christ was made at the Council of Chalcedon in 451:
Following the holy Fathers, we unanimously teach and confess one and the same Son, our Lord Jesus Christ: the same perfect in divinity and perfect in humanity, the same truly God and truly man, composed of rational soul and body; consubstantial with the Father as to his divinity and consubstantial with us as to his humanity; "like us in all things but sin." He was begotten from the Father before all ages as to his divinity and in these last days, for us and for our salvation, was born as to his humanity of the virgin Mary, the Mother of God.
We confess that one and the same Christ, Lord, and only-begotten Son, is to be acknowledged in two natures without confusion, change, division, or separation. The distinction between natures was never abolished by their union, but rather the character proper to each of the two natures was preserved as they came together in one person (prosopon) and one hypostasis.
patristics | House of Theodosius | Ancient Roman Christianity | Oriental Orthodoxy | 451 | Eastern Orthodox Church councils
Concili de Calcedònia | Chalkedonský koncil | Konzil von Chalcedon | Concilio de Calcedonia | Concile de Chalcédoine | Konsili Khalsedon | Concilio di Calcedonia | Concilie van Chalcedon | カルケドン公会議 | Konsilet i Kalkedon | Sobór chalcedoński | Concílio de Calcedónia | Conciliul de la Calcedon | Халкидонский собор | Четврти Васељенски Сабор | Khalkedonin kirkolliskokous | Konciliet i Chalcedon | 迦克墩公會議
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