Council of Chalcedon in the context of "Nestorianism"

The Greek Orthodox Patriarchate of Alexandria and all Africa (Ancient Greek: Πατριαρχεῖον Ἀλεξανδρείας καὶ πάσης Ἀφρικῆς, romanized: Patriarkheîon Alexandreías ke pásīs Afrikês, lit. 'The Patriarchate of Alexandria and all Africa'), also known as the Greek Orthodox Church of Alexandria, is an autocephalous patriarchate that is part of the Eastern Orthodox Church. Its seat is in Alexandria, and it has canonical responsibility for the entire African continent.

It is commonly called the Greek or Eastern Orthodox Patriarchate of Alexandria to distinguish it from the Coptic Orthodox Patriarchate of Alexandria. Members of the Greek Orthodox Patriarchate were once referred to as "Melkites" by non-Chalcedonian Christians because they remained in communion with the Ecumenical Patriarchate of Constantinople after the schism that followed the Council of Chalcedon in 451. Mark the Evangelist is considered the founder of the See, and the Patriarchate's emblem is the Lion of Saint Mark.

The Ecumenical Patriarch of Constantinople (Greek: Οἰκουμενικός Πατριάρχης, romanized: Oikoumenikós Patriárchēs) is the archbishop of Constantinople and primus inter pares (first among equals) among the heads of the several autocephalous churches that comprise the Eastern Orthodox Church. The ecumenical patriarch is regarded as the representative and spiritual leader of the Eastern Orthodox Christians worldwide. The term ecumenical in the title is a historical reference to the Ecumene, a Greek designation for the civilised world, i.e. the Roman Empire, and it stems from Canon 28 of the Council of Chalcedon.

The patriarch's see, the Ecumenical Patriarchate of Constantinople, is one of the most enduring institutions in the world and has had a prominent part in world history. The ecumenical patriarchs in ancient times helped in the spread of Christianity and the resolution of various doctrinal disputes. In the Middle Ages, they played a major role in the affairs of the Eastern Orthodox Church, as well as in the politics of the Orthodox world, and in spreading Christianity among the Slavs. Currently, in addition to the expansion of the Christian faith and the Eastern Orthodox doctrine, the patriarchs are involved in ecumenism and interfaith dialogue, charitable work, and the defense of Orthodox Christian traditions.

In the history of Christianity, the first seven ecumenical councils are as follows: the First Council of Nicaea in 325, the First Council of Constantinople in 381, the Council of Ephesus in 431, the Council of Chalcedon in 451, the Second Council of Constantinople in 553, the Third Council of Constantinople from 680 to 681 and finally, the Second Council of Nicaea in 787.

These seven events represented an attempt by Church leaders to reach an orthodox consensus, restore peace and develop a unified Christendom. Among Eastern Christians the Eastern Orthodox, Oriental Orthodox, and Church of the East (Assyrian) churches and among Western Christians the Roman Catholic, Anglican, Utrecht and Polish National Old Catholic, and some Scandinavian Lutheran churches all trace the legitimacy of their clergy by apostolic succession back to this period and beyond, to the earlier period referred to as the Early Church.

Patriarchate (/ˈpeɪtriɑːrkɪt, -keɪt/, UK also /ˈpætri-/; Ancient Greek: πατριαρχεῖον, patriarcheîon) is an ecclesiological term in Christianity, referring to the office and jurisdiction of a patriarch.

According to Christian tradition, three patriarchates—Rome, Antioch, and Alexandria—were established by the apostles as apostolic sees in the 1st century. These were officially recognized by the First Council of Nicaea. The Patriarchate of Constantinople was added in the 4th century, and the Patriarchate of Jerusalem followed in the 5th century. These five sees were later recognized collectively as the pentarchy by the Council of Chalcedon in 451.

The Orient is a term referring to the East in relation to Europe, traditionally comprising anything belonging to the Eastern world. It is the antonym of the term Occident, which refers to the Western world.

In English, it is largely a metonym for, and coterminous with, the continent of Asia – loosely classified into Southwest Asia, Southeast Asia, South Asia, Central Asia, East Asia, and sometimes including the Caucasus. Originally, the term Orient was used to designate only the Near East, but later its meaning evolved and expanded, designating also Central Asia, Southwest Asia, South Asia, Southeast Asia, or the Far East.

In Christian theology, the incarnation is the belief that the pre-existent divine person of Jesus Christ, God the Son, the second person of the Trinity, who is also the Logos (Koine Greek for 'word'), was "made flesh" by being conceived through the power of the Holy Spirit in the womb of a woman, the Virgin Mary, who is also known as the Theotokos (Greek for "God-bearer" or "Mother of God"). The doctrine of the incarnation then entails that Jesus was at the same time both fully God and fully human.

In the incarnation, as traditionally defined by those Churches that adhere to the Council of Chalcedon, the divine nature of the Son was united but not mixed with human nature in one divine person, Jesus, or according to those adhering to the Council of Ephesus, the divine and human natures of Christ are fully united into one composite nature "without mixing, confusion, or separation". This is central to the traditional faith held by most Christians. Alternative views on the subject (see Ebionites and the Gospel of the Hebrews) have been proposed throughout the centuries, but all were rejected by Nicene Christianity.

The Nicene Creed, also called the Creed of Constantinople, is the defining statement of belief of Nicene Christianity and in those Christian denominations that adhere to it.

The original Nicene Creed was first adopted at the First Council of Nicaea in 325. According to the traditional view, forwarded by the Council of Chalcedon of 451, the Creed was amended in 381 by the First Council of Constantinople as "consonant to the holy and great Synod of Nice." However, many scholars comment on these ancient Councils, saying "there is a failure of evidence" for this position since no one between the years of 381–451 thought of it in this light. Further, a creed "almost identical in form" was used as early as 374 by St. Epiphanius of Salamis. Nonetheless, the amended form is presently referred to as the Nicene Creed or the Niceno-Constantinopolitan Creed.

Chalcedonian Christianity is the branch of Christianity that accepts and upholds theological resolutions of the Council of Chalcedon, the fourth ecumenical council, held in AD 451. Chalcedonian Christianity accepts the Christological Definition of Chalcedon, a Christian doctrine concerning the union of two natures (divine and human) in one hypostasis of Jesus Christ, who is thus acknowledged as a single person (prosopon). Chalcedonian Christianity also accepts the Chalcedonian confirmation of the Niceno-Constantinopolitan Creed, thus acknowledging the commitment of Chalcedonism to Nicene Christianity.

Chalcedonian Christology is upheld by Roman Catholicism, Eastern Orthodoxy, Lutheranism, Anglicanism and Calvinism (Reformed Christianity), thus comprising the overwhelming majority of Christianity.

Melkite (/ˈmɛlkaɪt/) or Melchite churches are various Eastern Christian churches of the Byzantine Rite, and their members. The name comes from the Central Semitic root m-l-k 'royal', referring to the loyalty to the Byzantine emperor, and became a denominational designation for Christians who accepted imperial religious policies, notably the Council of Chalcedon (451).

Originally, during the Early Middle Ages, Melkites used both Koine Greek and Aramaic (Classical Syriac & Syro-Palestinian) language in their religious life, and initially employed the Antiochian rite in their liturgy, but later (10th–11th century) accepted the Constantinopolitan rite, and incorporated Arabic in parts of their liturgical practices.