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First Council of Constantinople

The First Council of Constantinople (Concilium Constantinopolitanum; Σύνοδος τῆς Κωνσταντινουπόλεως) was a council of Christian bishops convened in Constantinople (now Istanbul, Turkey) in AD 381 by the Roman Emperor Theodosius I. This second ecumenical council, an effort to attain consensus in the church through an assembly representing all of Christendom, except for the Western Church, confirmed the Nicene Creed, expanding the doctrine thereof to produce the Niceno-Constantinopolitan Creed, and dealt with sundry other matters. It met from May to July 381 in the Church of Hagia Irene and was affirmed as ecumenical in 451 at the Council of Chalcedon.

Background
Between 350 and 450 a number of heresies arose, forcing all Christian churches to clarify their answers to the question, "Who is Jesus Christ?" Around 380 Apollinaris, the Bishop of Laodicca, began to teach that Jesus Christ had a human body and lower soul. He believed that Christ's mind had been replaced by the divine word or logos, and that this logos was steady and immutable. Apollinaris' position raised a number of questions from Christians. Do not the gospels picture Jesus as a complete and genuine human being? If God displaced the reason of human nature and free will, how could He secure the personal salvation of mankind?

When Theodosius ascended to the imperial throne in 380 in this atmosphere of criticism and inquiry, he began on a campaign to bring the Eastern Church back to Nicene Christianity. Theodosius wanted to further unify the entire empire behind the orthodox position and decided to convene a church council to resolve matters of faith and discipline. Gregory Nazianzus was of similar mind, wishing to unify Christianity. In the spring of 381 they convened the second ecumenical council in Constantinople.

Theological context
R.P.C. Hanson stated:"'The Creed of Nicaea of 325, produced in order to end the controversy, signally failed to do so. Indeed, it ultimately confounded the confusion because its use of the words ousia and hypostasis was so ambiguous as to suggest that the Fathers of Nicaea had fallen into Sabellianism, a view recognized as heresy even at that period.'"Lewis Ayres, therefore, states:"“Within a few years (after Nicaea) there is a near-fifteen year absence before the creed is mentioned again.” “Nicaea's creed seemed problematic if not useless to many.”"After Nicaea, Arius and his sympathizers, e.g. Eusebius of Nicomedia were admitted back into the church after ostensibly accepting the Nicene creed. Athanasius, bishop of Alexandria, the most vocal opponent of Arianism, was ultimately exiled through the machinations of Eusebius of Nicomedia.

After the death of Constantine I in 337 and the accession of his Arian-leaning son Constantius II, open discussion of replacing the Nicene creed itself began. Up until about 360, theological debates mainly dealt with the divinity of the Son, the second person of the Trinity. However, because the Council of Nicaea had not clarified the divinity of the Holy Spirit, the third person of the Trinity, it became a topic of debate. The Macedonians denied the divinity of the Holy Spirit. This was also known as Pneumatomachianism.

Nicene Christianity also had its defenders: apart from Athanasius, the Cappadocian Fathers' Trinitarian discourse was influential in the council at Constantinople. Apollinaris of Laodicea, another pro-Nicene theologian, proved controversial. Possibly in an over-reaction to Arianism and its teaching that Christ was not God, he taught that Christ consisted of a human body and a divine mind, rejecting the belief that Christ had a complete human nature, including a human mind. He was charged with confounding the persons of the Godhead, and with giving in to the heretical ways of Sabellius. Basil of Caesarea accused him of abandoning the literal sense of the scripture, and taking up wholly with the allegorical sense. His views were condemned in a Synod at Alexandria, under Athanasius of Alexandria, in 362, and later subdivided into several different heresies, the main ones of which were the Polemians and the Antidicomarianites.

Ecumenical Council
This Council is identified as the second ecumenical council. However:"“The details … of this council indicate the problems with later presentation of the meeting as an ‘ecumenical’ reaffirmation of Nicaea.” “It seems unlikely that this meeting was intended as a universal council to rival Seleucia/Ariminum or Nicaea itself. … Those present at the council initially came from a fairly restricted area and the majority from areas known to be favourable to Meletius.”"Furthermore, the delegated were carefully chosen:"“Only about 150 bishops attended and they appear to have been carefully chosen from areas which would be friendly to Meletius, who was its president, that is areas under the influence of the see of Antioch.”"Rome was not involved in this council at all. Hanson refers to the “tenuous contact which the council might have been thought to have with the see of Rome.”

Geopolitical context
The political context is important because, as Simonetti remarked, "the Emperor was in fact the head of the church." And, as Hanson stated: "If we ask the question, what was considered to constitute the ultimate authority in doctrine during the period reviewed in these pages, there can be only one answer. The will of the Emperor was the final authority." “When (emperor) Constantius died in 361 his immediate successor was his cousin Julian.” "As Emperor, Julian soon became an active non-Christian, repudiating the Christianity that he had earlier professed. In his attempt to undermine the Church Julian tried to foment dissension between groups in the Church.”  But Julian ruled only for two years.

“After Julian's death in 363 … Constantius' most powerful successors emerged: in the east the Emperor Valens (364–78); in the west the Emperor Valentinian (364–75).”

“Valens, like Constantius, has gone down in history as an ‘Arian’ emperor.” However, “again like Constantius, (he) was a pragmatic ruler prepared to promote Homoians when possible, but not at any great cost to his civil administration.” For example, “his eventual acceptance of Athanasius' position in Alexandria” and his “accepting Basil's (Basil of Caesarea) significant role in the Church of Asia Minor.” “Valens was considerably more hostile towards Heterousian theology. … While we read the fourth century so easily in terms of a battle between Nicenes and their opponents, it is important to remember that differences between non-Nicenes were equally important.” Under Valens, “open and large-scale challenge to the Homoian creed would have been impossible in the east: the creed of 359–60 was maintained as a universal standard.”

Valens was killed in 378 at “the battle of Adrianople in 378.” “A large Roman army was defeated and, by some estimates, as many as two-thirds of the troops were wiped out.”  “The authority that had promoted Homoian interests (Valens) was now gone.”  Lewis Ayres explains how, in this period, various branches of Christianity attempted "to seize the initiative.”

Theodosius was "declared Augustus in January 379 at the age of 32 or 33.” “Just as the victories of Constantius in 350–3 created the conditions for the rise of the Homoians, now the rise to power of a new emperor (Theodosius) enabled the victory of the pro-Nicene cause.”  In February 380 – already a year before the ‘ecumenical’ council of Constantinople – Theodosius issued a pro-Nicene edict saying: "“We shall believe in the Single Deity of the Father, the Son and the Holy Spirit, under the concept of equal majesty and of the Holy Trinity.”" He exiled leaders of the anti-Nicenes. For example: "When Theodosius had entered Constantinople in November 380 he had given the Homoian Demophilus the chance to remain as bishop if he subscribed to Nicaea. When he did not he was exiled and Theodosius accepted Gregory Nazianzen as de facto bishop." Theodosius issued a second Pro-Nicene decree a year later in January 381, which was still before the Council of Constantinople, saying: "“Almighty God and Christ the Son of God are one in name … (we should) not violate by denial the Holy Spirit … the undivided substance of the incorrupt Trinity.”"The second decree forbids “heretics,” meaning people who do not believe as required by the law, “the right to assemble for worship.”  Theodosius' strong commitment to Nicene Christianity involved a calculated risk because Constantinople, the imperial capital of the Eastern Empire, was solidly Arian.

To complicate matters, the two leading factions of Nicene Christianity in the East, the Alexandrians and the supporters of Meletius in Antioch, were "bitterly divided ... almost to the point of complete animosity". Furthermore, Damasus, bishop of Rome, and Basil, bishop of Caesarea and the first of the Cappadocian Fathers, opposed one another:"Damasus stated “that Basil's letters addressed to the West were returned as unacceptable.” “A confession of faith (was sent) from Damasus which Basil was to sign without altering a single word.” “Basil replied to this demand in a polite but biting letter.”"The bishops of Alexandria and Rome had worked over a number of years to keep the see of Constantinople from stabilizing. Thus, when Gregory was selected as a candidate for the bishopric of Constantinople, both Alexandria and Rome opposed him because of his Antiochene background.

Meletian schism
The Meletian schism refers to a dispute in the years preceding the 381-council between two Pro-Nicene groups about who the rightful bishop of Antioch is. Meletius was bishop of Antioch from 360 until his death in 381. He was opposed by a rival bishop named Paulinus. Athanasius and Damasus, the bishop of Rome, supported Paulinus: Paulinus “was recognized as legitimate bishop of Antioch by Athanasius. Later, Athanasius' successor Peter extended the same recognition to him and persuaded Damasus to do the same.” (RH, 801) “In May 373 Athanasius died, Peter his successor was driven out, fled to Rome, and proceeded to poison the mind of Damasus against Basil and Meletius.” In 375, Damasus wrote a letter which “constituted also an official recognition of Paulinus, not Meletius, as bishop of Antioch.” In contrast, Basil of Caesarea, the first of the Cappadocian fathers, supported Meletius: “Basil would not desert Meletius and Athanasius would not recognize him (Meletius) as bishop of Antioch.” (RH, 797) “Paulinus was a rival of Basil's friend and ally Meletius.” This dispute was not simply one of personalities but deeply theological. Basil opposed Paulinus because Paulinus was a 'one hypostasis' (Sabellian) theologian:"Paulinus was “Marcellan/Sabellian.” He derived “his tradition in continuity from Eustathius who had been bishop about forty years before.” 'The fragments of Eustathius that survive present a doctrine that is close to Marcellus, and to Alexander and Athanasius. Eustathius insists there is only one hypostasis.“  'Basil suspected that Paulinus was at heart a Sabellian, believing in only one Person (hypostasis) in the Godhead. Paulinus' association with the remaining followers of Marcellus and his continuing to favour the expression 'one hypostasis' … rendered him suspect.”"But Damasus supported Paulinus because he (Damasus) was also a 'one hypostasis' (Sabellian) theologian:"Basil wrote a letter which “contained some shafts directed at Damasus because of his toleration of Eustathius and the Marcellans.” In response to a letter from Basil, “Damasus sent a very cool reply … conveying a considerable theological statement on the ousia and the personae which deliberately avoided making any statement about the three hypostases. It was the adhesion of Basil, Meletius and their followers to this doctrine of the hypostases which caused Damasus … to suspect them of heresy.”"As quoted above, Athanasius supported Paulinus because he (Athanasius) was also a 'one hypostasis' (Sabellian) theologian. The following confirms this:"“Basil was never sure in his own mind that Athanasius had abandoned Marcellus of Ancyra and his followers.” “In a letter written to Athanasius he (Basil of Caesarea) complains that the Westerners have never brought any accusation against Marcellus.” “About the year 371 adherents of Marcellus approached Athanasius, presenting to him a statement of faith. … He accepted it and gave them a document expressing his agreement with their doctrine.”"In conclusion, both Damasus and Basil are regarded as pro-Nicene leaders, but Damasus, Athanasius, and Paulinus were 'one hypostasis' (Sabellian) theologians while Basil and his friend Meletius taught three hypostases (three Persons or Realities). This schism resulted in hostile relationships:"“Basil writes letters to Athanasius asking him to approach Damasus and assist Basil's overtures. None of them was answered and nothing came of them.” Damasus stated “that Basil's letters addressed to the West were returned as unacceptable.” “A confession of faith (was sent) from Damasus which Basil was to sign without altering a single word.” “Basil replied to this demand in a polite but biting letter.”"

See of Constantinople
The incumbent bishop of Constantinople was Demophilus, a Homoian Arian. On his accession to the imperial throne, Theodosius offered to confirm Demophilus as bishop of the imperial city on the condition of accepting the Nicene Creed; however, Demophilus refused to abandon his Arian beliefs, and was immediately ordered to give up his churches and leave Constantinople. After forty years under the control of Arian bishops, the churches of Constantinople were now restored to those who subscribed to the Nicene Creed; Arians were also ejected from the churches of other cities in the Eastern Roman Empire thus re-establishing Christian orthodoxy in the East.

There ensued a contest to control the newly recovered see. A group led by Maximus the Cynic gained the support of Patriarch Peter of Alexandria by playing on his jealousy of the newly created see of Constantinople. They conceived a plan to install a cleric subservient to Peter as bishop of Constantinople so that Alexandria would retain the leadership of the Eastern Churches. Many commentators characterize Maximus as having been proud, arrogant and ambitious. However, it is not clear the extent to which Maximus sought this position due to his own ambition or if he was merely a pawn in the power struggle. In any event, the plot was set into motion when, on a night when Gregory was confined by illness, the conspirators burst into the cathedral and commenced the consecration of Maximus as bishop of Constantinople. They had seated Maximus on the archiepiscopal throne and had just begun shearing away his long curls when the day dawned. The news of what was transpiring quickly spread and everybody rushed to the church. The magistrates appeared with their officers; Maximus and his consecrators were driven from the cathedral, and ultimately completed the tonsure in the tenement of a flute-player.

The news of the brazen attempt to usurp the episcopal throne aroused the anger of the local populace among whom Gregory was popular. Maximus withdrew to Thessalonica to lay his cause before the emperor but met with a cold reception there. Theodosius committed the matter to Ascholius, the much respected bishop of Thessalonica, charging him to seek the counsel of Pope Damasus I.

Damasus' response repudiated Maximus summarily and advised Theodosius to summon a council of bishops for the purpose of settling various church issues such as the schism in Antioch and the consecration of a proper bishop for the see of Constantinople. Damasus condemned the translation of bishops from one see to another and urged Theodosius to "take care that a bishop who is above reproach is chosen for that see."

Proceedings

Thirty-six Pneumatomachians arrived but were denied admission to the council when they refused to accept the Nicene creed.

Since Peter, the Pope of Alexandria, was not present, the presidency over the council was given to Meletius as Patriarch of Antioch. The first order of business before the council was to declare the clandestine consecration of Maximus invalid, and to confirm Theodosius' installation of Gregory Nazianzus as Archbishop of Constantinople. When Meletius died shortly after the opening of the council, Gregory was selected to lead the council.

The Egyptian and Macedonian bishops who had supported Maximus's ordination arrived late for the council. Once there, they refused to recognise Gregory's position as head of the church of Constantinople, arguing that his transfer from the See of Sasima was canonically illegitimate because one of the canons of the Council of Nicaea had forbidden bishops to transfer from their sees.

McGuckin describes Gregory as physically exhausted and worried that he was losing the confidence of the bishops and the emperor. Ayres goes further and asserts that Gregory quickly made himself unpopular among the bishops by supporting the losing candidate for the bishopric of Antioch and vehemently opposing any compromise with the Homoiousians.

Rather than press his case and risk further division, Gregory decided to resign his office: "Let me be as the Prophet Jonah! I was responsible for the storm, but I would sacrifice myself for the salvation of the ship. Seize me and throw me... I was not happy when I ascended the throne, and gladly would I descend it." He shocked the council with his surprise resignation and then delivered a dramatic speech to Theodosius asking to be released from his offices. The emperor, moved by his words, applauded, commended his labor, and granted his resignation. The council asked him to appear once more for a farewell ritual and celebratory orations. Gregory used this occasion to deliver a final address (Or. 42) and then departed.

Nectarius, an unbaptized civil official, was chosen to succeed Gregory as president of the council.

Canons
Seven canons, four of these doctrinal canons and three disciplinary canons, are attributed to the council and accepted by both the Eastern Orthodox Church and the Oriental Orthodox Churches; the Roman Catholic Church accepts only the first four because only the first four appear in the oldest copies and there is evidence that the last three were later additions.

 * The first canon is an important dogmatic condemnation of all shades of Arianism, and also of Macedonianism and Apollinarianism.
 * The second canon renewed the Nicene legislation imposing upon the bishops the observance of diocesan and patriarchal limits.
 * The third canon reads:"The Bishop of Constantinople, however, shall have the prerogative of honour after the Bishop of Rome because Constantinople is New Rome."
 * The fourth canon decreed the consecration of Maximus as Bishop of Constantinople to be invalid, declaring "that [Maximus] neither was nor is a bishop, nor are they who have been ordained by him in any rank of the clergy". This canon was directed not only against Maximus, but also against the Egyptian bishops who had conspired to consecrate him clandestinely at Constantinople, and against any subordinate ecclesiastics that he might have ordained in Egypt.
 * The fifth canon might actually have been passed the next year, 382, and is in regard to a Tome of the Western bishops, perhaps that of Pope Damasus I.
 * The sixth canon might belong to the year 382 as well and was subsequently passed at the Quinisext Council as canon 95. It limits the ability to accuse bishops of wrongdoing.
 * The seventh canon regards procedures for receiving certain heretics into the church.

Dispute concerning the third canon
The third canon was a first step in the rising importance of the new imperial capital, just fifty years old, and was notable in that it demoted the patriarchs of Antioch and Alexandria. Jerusalem, as the site of the first church, retained its place of honor. It originally did not elicit controversy, as the Papal legate Paschasinus and a partisan of his, Diogenes of Cyzicus, reference the canon as being in force during the first session of the Council of Chalcedon. According to Eusebius of Dorlyeum, another Papal ally during Chalcedon, "I myself read this very canon [Canon 3] to the most holy pope in Rome in the presence of the clerics of Constantinople and he accepted it."

Nevertheless, controversy has ensued since then. The status of the canon became questioned after disputes over Canon 28 of the Council of Chalcedon erupted. Pope Leo the Great, declared that this canon had never been submitted to Rome and that their lessened honor was a violation of the Nicene council order. Throughout the next several centuries, the Western Church asserted that the Bishop of Rome had supreme authority, and by the time of the Great Schism the Roman Catholic Church based its claim to supremacy on the succession of St. Peter. At the Fourth Council of Constantinople (869), the Roman legates asserted the place of the bishop of Rome's honor over the bishop of Constantinople's. After the Great Schism of 1054, in 1215 the Fourth Lateran Council declared, in its fifth canon, that the Roman Church "by the will of God holds over all others pre-eminence of ordinary power as the mother and mistress of all the faithful". Roman supremacy over the whole world was formally claimed by the new Latin patriarch. The Roman correctores of Gratian, insert the words: "canon hic ex iis est quos apostolica Romana sedes a principio et longo post tempore non recipit" ("this canon is one of those that the Apostolic See of Rome has not accepted from the beginning and ever since").

Later on, Baronius asserted that the third canon was not authentic, not in fact decreed by the council. Contrarily, roughly contemporaneous Greeks maintained that it did not declare supremacy of the Bishop of Rome, but the primacy; "the first among equals", similar to how they today view the Bishop of Constantinople.

Aftermath
It has been asserted by many that a synod was held by Pope Damasus I in the following year (382) which opposed the disciplinary canons of the Council of Constantinople, especially the third canon which placed Constantinople above Alexandria and Antioch. The synod protested against this raising of the bishop of the new imperial capital, just fifty years old, to a status higher than that of the bishops of Alexandria and Antioch, and stated that the primacy of the Roman see had not been established by a gathering of bishops but rather by Christ himself. Thomas Shahan says that, according to Photius too, Pope Damasus approved the council, but he adds that, if any part of the council were approved by this pope, it could have been only its revision of the Nicene Creed, as was the case also when Gregory the Great recognized it as one of the four general councils, but only in its dogmatic utterances.

Niceno-Constantinopolitan Creed
Traditionally, the Niceno-Constantinopolitan Creed has been associated with the Council of Constantinople (381). It is roughly theologically equivalent to the Nicene Creed, but includes two additional articles: an article on the Holy Spirit—describing Him as "the Lord, the Giver of Life, Who proceeds from the Father, Who with the Father and the Son is worshipped and glorified, and Who spoke through the prophets"—and an article about the church, baptism, and the resurrection of the dead. (For the full text of both creeds, see Comparison between Creed of 325 and Creed of 381.)

However, scholars are not agreed on the connection between the Council of Constantinople and the Niceno-Constantinopolitan Creed. Some modern scholars believe that this creed, or something close to it, was stated by the bishops at Constantinople, but not promulgated as an official act of the council. Scholars also dispute whether this creed was simply an expansion of the Creed of Nicaea, or whether it was an expansion of another traditional creed similar but not identical to the one from Nicaea. In 451, the Council of Chalcedon referred to this creed as "the creed ... of the 150 saintly fathers assembled in Constantinople", indicating that this creed was associated with Constantinople (381) no later than 451.

Christology
This council condemned Arianism which began to die out with further condemnations at a council of Aquileia by Ambrose of Milan in 381. With the discussion of Trinitarian doctrine now developed, the focus of discussion changed to Christology, which would be the topic of the Council of Ephesus of 431 and the Council of Chalcedon of 451.

Shift of influence from Rome to Constantinople
David Eastman cites the First Council of Constantinople as another example of the waning influence of Rome over the East. He notes that all three of the presiding bishops came from the East. Damasus had considered both Meletius and Gregory to be illegitimate bishops of their respective sees and yet, as Eastman and others point out, the Eastern bishops paid no heed to his opinions in this regard.

The First Council of Constantinople (381) was the first appearance of the term 'New Rome' in connection to Constantinople. The term was employed as the grounds for giving the relatively young church of Constantinople precedence over Alexandria and Antioch ('because it is the New Rome').

Liturgical commemorations
The 150 individuals at the council are commemorated in the Calendar of saints of the Armenian Apostolic Church on February 17.

The Eastern Orthodox Church in some places (e.g. Russia) has a feast day for the Fathers of the First Six Ecumenical Councils on the Sunday nearest to July 13 and on May 22.

title: First Council of Constantinople


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Fourth Council of Constantinople (Eastern Orthodox)

The Fourth Council of Constantinople was held in 879–880. It confirmed the reinstatement of Photius I as patriarch of Constantinople.

The result of this council is accepted by the Eastern Orthodox as having the authority of an ecumenical council. Eastern Orthodox sometimes call it the eighth ecumenical council.

Background
The Council settled the dispute that had broken out after the deposition of Ignatius as Patriarch of Constantinople in 858. Ignatius, himself appointed to his office in an uncanonical manner, opposed Caesar Bardas, who had deposed the regent Theodora. In response, Bardas' nephew, the youthful Emperor Michael III engineered Ignatius's deposition and confinement on the charge of treason. The patriarchal throne was filled with Photius, a renowned scholar and kinsman of Bardas. The deposition of Ignatius without a formal ecclesiastical trial and the sudden promotion of Photios caused scandal in the church. Pope Nicholas I and the western bishops took up the cause of Ignatios and condemned Photios's election as uncanonical. In 863, at a synod in Rome the pope deposed Photios, and reappointed Ignatius as the rightful patriarch. However, Photius enjoined the support of the Emperor and responded by calling a Council and excommunicating the pope.

This state of affairs changed when Photius's patrons, Bardas and Emperor Michael III, were murdered in 866 and 867, respectively, by Basil the Macedonian, who now usurped the throne. Photios was deposed as patriarch, not so much because he was a protégé of Bardas and Michael, but because Basil was seeking an alliance with the Pope and the western emperor. Photios was removed from his office and banished about the end of September 867, and Ignatios was reinstated on 23 November. Photios was condemned by a Council held at Constantinople from 5 October 869 to 28 February 870. Photius was deposed and barred from the patriarchal office, while Ignatius was reinstated.

Council of 879–880
After the death of Ignatius in 877, the Emperor made Photius again Patriarch of Constantinople. A council was convened in 879, held at Constantinople, comprising the representatives of all the five patriarchates, including that of Rome (all in all 383 bishops). Anthony Edward Siecienski writes: "In 879 the emperor called for another council to meet in Constantinople in the hopes that the new pope, John VIII (872-882) would recognize the validity of Photius's claim upon the patriarchate. This council, sometimes called the eighth ecumenical in the East was attended by the papal legates (who had brought with them a gift from the pope—a pallium for Photius) and by over 400 bishops, and who immediately confirmed Photius as rightful patriarch."

The council also implicitly condemned the addition of the Filioque to the Nicene-Constantinopolitan Creed, an addition rejected at that time in Rome: "The Creed (without the filioque) was read out and a condemnation pronounced against those who 'impose on it their own invented phrases [ἰδίας εὑρεσιολογίαις] and put this forth as a common lesson to the faithful or to those who return from some kind of heresy and display the audacity to falsify completely [κατακιβδηλεῦσαι άποθρασυνθείη] the antiquity of this sacred and venerable Horos [Rule] with illegitimate words, or additions, or subtractions'." Eastern Orthodox Christians argue that thereby the council condemned not only the addition of the Filioque clause to the creed but also denounced the clause as heretical (a view strongly espoused by Photius in his polemics against Rome), while Roman Catholics separate the two and insist on the theological orthodoxy of the clause. According to non-Catholic Philip Schaff, "To the Greek acts was afterwards added a (pretended) letter of Pope John VIII to Photius, declaring the Filioque to be an addition which is rejected by the church of Rome, and a blasphemy which must be abolished calmly and by degrees."

Confirmation and further reception
The council was held in the presence of papal legates, who approved of the proceedings.

Roman Catholic historian Francis Dvornik argues that the pope accepted the acts of the council and annulled those of the Council of 869–870. Other Catholic historians, such as Warren Carroll, dispute this view, arguing that the pope rejected the council. Siecienski says that the Pope gave only a qualified assent to the acts of the council. Philip Schaff opines that the pope, deceived by his legates about the actual proceedings, first applauded the emperor but later denounced the council. In any case, the Pope had already accepted the reinstatement of Photius as Patriarch.

On 8 March 870, three days after the end of the council, the papal and Eastern delegates met with the Bulgarian ambassadors led by the kavhan Peter to decide the status of the Bulgarian Orthodox Church. Since the Bulgarians were not satisfied with the positions of the Pope after prolonged negotiations, they reached favorable agreement with the Byzantines and the decision was taken that the Bulgarian Church should become Eastern Christian.

The Photian Schism (863–867) that led to the councils of 869 and 879 represents a break between East and West. While the previous seven ecumenical councils are recognized as ecumenical and authoritative by both East and West, many Eastern Orthodox Christians recognize the council of 879 as the Eighth Ecumenical Council, arguing that it annulled the earlier one. This council is referred to as Ecumenical in the Encyclical of the Eastern Patriarchs of 1848. The Catholic Church, however, recognizes the council of 869 as the eighth ecumenical council and does not place the council of 879 among its ecumenical councils.

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