The break of 1054
Previous story
Long before the rupture of 1054, there had already been repeated serious upheavals between the Eastern and Western Churches. The so-called Photios Schism, which lasted from 863 to 867, can be regarded as particularly drastic, which for the first time completely revealed the deep rift that had opened up in the course of the centuries between the Eastern and the Western Church. After the abolition of the schism, the points of contention, which were still present and basically completely unresolved, were again pushed into the background before they were brought to the fore again for political reasons in the 11th century.
From the 11th century onwards, the reform papacy made increasing efforts to assert its increased understanding of primacy vis-à-vis the emperor, but also vis-à-vis the Eastern Church. Pope Leo IX's renewed attempt to demand ecclesiastical supremacy over those Byzantine territories in southern Italy that had been lost to him in the 8th century in exchange for a joint anti-Norman military campaign with the Byzantine authorities of southern Italy should also be understood in this context.
In addition, there was now also an increasing tendency to emphasize the complete impossibility of a papal or Catholic error, and to regard those forces within the Eastern Church that rejected the Roman Church's claim to leadership no longer merely as schismatics, but even as heretics.
Among members of the high Byzantine clergy, the increased understanding of primacy of the reform papacy met with strong rejection quite early on. They also reacted sensitively to the alliance between the basileus and the pope to combat the "Norman plague", because they feared the consequences for church policy. At first, however, the Byzantine church leaders kept in the background and only tried to delay negotiations about further action in southern Italy and to bring them to a halt by accusations against the governor of southern Italy, until in 1052 or 1053 they decided to take a more offensive approach.
The Latin church of Constantinople was closed and Latin worship was forbidden. The pretext given for the closure was the use by the Latins of the wrong sacrificial material, namely unleavened bread instead of leavened. The Latins were accused of following "Mosaic relics," and in consequence even sometimes denied to be true Christians. The latter accusation even led Michael Kerularios, Patriarch of Constantinople, to the necessity of a new baptism of the Latins.
History of the rupture of 1054
Due to the preceding events, the climate between the Latin legation led by Hubert of Silva Candida, a convinced advocate of church reform, and the Byzantine church leaders was extremely tense when they arrived in Constantinople in the spring of 1054. The pope, having suffered a serious defeat at the hands of the Normans, was in principle interested in an amicable solution to the conflict, but made an understanding conditional on the Greeks recognizing the Latin Eucharist as valid. However, the Greeks were not prepared to do this. Instead, at the convened synod, the legation was confronted with a list-like compilation of "Latin errors". Among other things, the Latins were accused of using the wrong sacrificial material and of improperly altering the Creed by inserting the "Filioque." Furthermore, the Greeks took offence at the beardlessness of the Latin priests, the depiction of the crucifixion in sculptural works and the prohibition of priestly marriage.
In response to the deadlocked negotiations, the envoys laid a bull of excommunication on the altar of Hagia Sophia on July 16, 1054. In the banns, the Greek church leaders were reviled as heretics, accused of simony, and excommunicated as a result of the accusations. It also condemned the (ahistorical) "erasure of the Filioque" from the Greek Creed, the permitting of priestly marriages, and the rebaptism of Latins in the wake of the closure of the Latin Church of Constantinople. The accusation of allowing priestly marriages in particular proved to be less than diplomatic, since it "encouraged the solidarization of the Greek clergy with Kerularios".
On July 21, 1054, the counter-banishment of the Latin envoys by the Greek church leaders took place in the course of a synod convened especially for this purpose. The patriarch had previously succeeded in creating the impression among the people that the Latins had banned not only the church leaders, but all of Eastern Christendom. The pope was not excommunicated at the synod, since his death was apparently already known to the Greek church leaders.
Direct consequences of the so-called schism
The so-called "Schism of 1054" found little resonance throughout Christendom. The people of the Church took hardly any notice of it, and even most of the contemporary chroniclers, Greek as well as Latin, the event was worth only a marginal note in their works.
Nevertheless, as a result of the so-called schism, the church leadership in Constantinople became more and more convinced that from now on they would be "separated from each other". Already around 1089 there was apparently the view among the church leadership of the whole Eastern Church that there had been a real break in 1054, in which not only some individuals had excommunicated each other, but the Western and Eastern Church as such, general consensus. The Western Church did not share this view, but in the aftermath of the 1054 rupture made efforts to counteract the alienation from the Eastern Church and to dispel doubts about the unity with the Eastern Church, which, however, did not succeed due to a simultaneous intensified push for the recognition of the papal primacy.
In 1095, Pope Urban II attempted to bring about an ecclesiastical peace with the Eastern Church through Latin military aid against the Seljuks, who had invaded deep into the Byzantine heartland a few years earlier. Although the military action was a complete success, tensions between the Latins and the Greeks continued to increase as a result, as the leaders of what would later be called the "First Crusade" broke all of their previously made promises to the Byzantine Empire without exception after the military action ended.
The Deepening of the Trench - The Fourth Crusade
Causes and circumstances
At the beginning of the 13th century is the controversial and much debated among historians event of the 4th Crusade. A Frankish-Venetian crusade, which seems to have been originally directed against Egypt or Palestine, was diverted by its leaders to Constantinople due to lack of funds.
Under pressure from the Latins, the Byzantine prince Alexios, whom they supported and who had previously held out the prospect of rich material rewards and church union for their services, was proclaimed co-emperor in Constantinople in 1203.
The Greek clergy reacted to the plans of an ecclesiastical union, which of course would have required the recognition of the papal primacy, with strong rejection and contempt. Thus, in 1203, the bishop of Corfu sarcastically commented on the matter: "He knew of no other reason for the primacy [...] of the Roman episcopate except that it was Roman soldiers who crucified Christ."
Since the Greeks failed to pay the Crusaders for their services, the Latins stormed the city on April 12, 1204 and set fire to it. The morning after storming the city, they began looting the city's palaces and residences, as well as its churches and monasteries. After the city had been extensively looted and robbed of its relics and art treasures, the emperor of the newly founded "Latin Empire", Balduin I, was crowned in the Hagia Sophia on 16 May 1204.
Consequences of the Excess for the Relationship between Eastern and Western Churches
Shortly after the sack of Constantinople, Pope Innocent III, who had forbidden the Latins to raise their swords against Christians even before the sack of the city, remarked to Boniface of Montferrat, a leader of the 4th Crusade, "that the Church of the Greeks [...] refuses to return to obedience to the Apostolic See, [for] she has seen in the Latins nothing but examples of corruption and works of darkness."
From the time of the sack of Constantinople and the founding of the Latin Empire, the rupture between the Eastern and Western Churches was no longer, for the common people, a mere dispute between theologians over matters that could seem almost like quibbles to a layman, but a bitter reality. The schism of 1054 had "become final" by the events of 1204. Even an emphatically preferential treatment of the Greek bishops in the areas occupied by the Latins could not change that.
The weight of the strong aversion of the common people against the Latins was also shown by the fact that later medieval efforts at union failed because of the resistance of the Greek church people. From now on it was no longer possible to bring the Orthodox Eastern Church under Roman sovereignty on the terms of the Latins.