East-West Schism in the context of "Papal legate"

Christianity in Albania began when Christians arrived in Illyria soon after the time of Jesus, with a bishop being appointed in Dyrrhachium (Epidamnus) in 58 AD.

When the Roman Empire was divided in 395 AD, modern Albania became part of the Byzantine Empire, but was under the jurisdiction of the Pope until 732, when Emperor Leo III placed the church under the Patriarch of Constantinople. When the Christian church split in 1054, the north followed Rome while the south of the country stayed with Constantinople.

Papal primacy, also known as the primacy of the bishop of Rome, is an ecclesiological doctrine in the Catholic Church concerning the respect and authority that is due to the pope from other bishops and their episcopal sees. While the doctrine is accepted at a fundamental level by both the Catholic Church (Eastern and Western) and the Eastern Orthodox Church, the two disagree on the nature of primacy.

English academic and Catholic priest Aidan Nichols wrote that "at root, only one issue of substance divides the Eastern Orthodox and the Catholic Churches, and that is the issue of the primacy." French Eastern Orthodox researcher Jean-Claude Larchet wrote that, together with the Filioque controversy, differences in interpretation of this doctrine have been and remain the primary causes of schism between the Catholic Church and the Eastern Orthodox Church. In the Eastern Orthodox churches, some understand the primacy of the bishop of Rome to be merely one of greater honour, regarding him as primus inter pares ("first among equals"), without effective power over other churches. A prominent 20th century Eastern Orthodox Christian theologian, Fr. Alexander Schmemann, envisioned a primacy that sums up rather than rules over: "Primacy is power, but as power it is not different from the power of a bishop in each church. It is not a higher power but indeed the same power, only expressed, manifested, and realized by one."

During its long history, the Catholic Church has been subject to criticism regarding various beliefs and practices. Within the church, this often involves opposition or support for practices associated with traditionalist Catholicism. In the past, different interpretations of scripture and various other critiques contributed to schisms such as the schism with the Eastern Orthodox Church and the Protestant Reformation. The Catholic Church has also been criticized for some of its historical actions, such as the church's promotion of the Crusades, and at various times by nationalist groups who feared the influence of Catholicism in undermining their regime. Furthermore, the Catholic Church has been criticized for not practicing ordination of women to the priesthood, its handling of incidents of sexual abuse, its involvement with various dictatorial regimes, and various inter-faith interactions.

This article talks about both the self-criticism of the Catholic Church by people who identify themselves as Catholic, and the cross-criticism of people from other denominations of Christianity, other religions, atheism, agnosticism or even indifference.

Several differences exist within the organizational structures and governance of the Catholic Church and the Eastern Orthodox Church. These are distinguished from theological differences which are differences in dogma and doctrine. A number of disagreements over matters of ecclesiology developed slowly between the Western and Eastern wings of the State church of the Roman Empire centered upon the cities of Rome (considered to have fallen in 476) and New Rome/Constantinople (also considered to have "fallen" in 1453) respectively. The disputes were a major factor in the formal East-West Schism between Pope Leo IX and Patriarch Michael I in 1054 and are largely still unresolved between the churches today.

Kayaköy (also: Kaya or Livissi) is a neighbourhood of the municipality and district of Fethiye, Muğla Province, Turkey. In 2022, its population was 975. Situated 8 km south of Fethiye, it is mostly abandoned. It was anciently known in Greek as Karmylessos (Ancient Greek: Καρμυλησσός), shortened to Lebessos (Ancient Greek: Λεβέσσος) and pronounced in Modern Greek as Leivissi (Greek: Λειβίσσι). From Ancient Greek the town name shifted to Koine Greek by the Roman period, evolved into Byzantine Greek in the Middle Ages, and finally became the Modern Greek name still used by its townspeople before their final evacuation in 1923.

In late antiquity the inhabitants of the region had become Christian and, following the East-West Schism with the Church of Rome in 1054 AD, they came to be called Greek Orthodox Christian. These Greek-speaking Christian subjects, and their Turkish-speaking Muslim Ottoman rulers, lived in relative harmony from the end of the turbulent Ottoman conquest of the region in the 14th century until the early 20th century. Following the Greco-Turkish War of 1919–1922, and the subsequent Treaty of Lausanne in 1923, the town's Greek Orthodox residents were exiled from Livissi.

Mihailo Vojislavljević (Serbian Cyrillic: Михаило Војислављевић) was a medieval Serbian king and the ruler of Dioclea (Duklja), from 1046 to 1081, initially as a Byzantine vassal holding the title of protospatharios, then after 1077 as nominally serving Pope Gregory VII, styled as "King of the Slavs". He had alienated himself from the Byzantines when he supported the Bulgarian Uprising of Georgi Voyteh, after which he then sought to gain support in the West. In 1077 he received royal insignia by Gregory VII in the aftermath of the Church schism of 1054.

Doctor of the Church (Latin: doctor "teacher"), also referred to as Doctor of the Universal Church (Latin: Doctor Ecclesiae Universalis), is a title given by the Catholic Church to saints recognized as having made a significant contribution to theology or doctrine through their research, study, or writing.

As of 2025, the Catholic Church has named 38 Doctors of the Church. Of these, the 18 who died before the Great Schism of 1054 are also held in high esteem by the Eastern Orthodox Church, although it does not use the formal title Doctor of the Church.