Origen of Alexandria in the context of "Celsus"

Various early Christian writers wrote gospels and other books, some of which were canonized as the New Testament canon developed. The Apostolic Fathers were prominent writers who are traditionally understood to have met and learned from Jesus's personal disciples. The Church Fathers are later writers with no direct connection to the disciples (other than the claim to apostolic succession). Early Christian apologists tried to defend Christianity against its critics, especially the Ancient Greek and Roman philosophers. Dates given, if not otherwise specified, are of their writings or bishopric, not of their lives.

• Paul of Tarsus, "Apostle to the Gentiles", earliest New Testament author 45~65
• Four Evangelists, traditionally identified as the authors of the canonical gospels 60~125
• Ignatius, bishop of Antioch, apostolic father 68~107
• Marcion of Sinope, evangelist and theologian, founder of Marcionism, published the first known canon of the New Testament, 85~160
• Clement of Rome, bishop of Rome, apostolic father 88~101
• Papias, bishop of Hierapolis, apostolic father 110~130
• Polycarp of Smyrna, bishop of Smyrna, apostolic father 110~160
• Aristides of Athens, apologist ~120
• Justin Martyr, church father ~165
• Melito of Sardis, bishop of Sardis, ~180
• Irenaeus, bishop of Lyon, disciple of Polycarp, apologist 180~202
• Origen of Alexandria, 185~254, Neoplatonist, controversial during his lifetime, posthumously condemned at the Second Council of Constantinople in 553
• Tatian, pupil of Justin Martyr, ascetic theologian ~185
• Athenagoras of Athens, philosopher, apologist ~190
• Polycrates, bishop of Ephesus, excommunicated by Victor I of Rome over the Easter controversy ~196
• Montanus, self-proclaimed prophet and founder of Montanism, last quarter of 2nd century CE
• Tertullian, church father, apologist, first Christian writer in Latin, later a Montanist 197~230
• Hippolytus, church father, sometimes termed the first Antipope, reconciled with the church and died a martyr 217~236
• Cyprian, bishop of Carthage, martyr 218~258
• Clement of Alexandria, church father, Bishop of Alexandria ~220
• Novatian, a rigorist and Antipope in 251
• Dionysius, patriarch of Alexandria, pope of the Coptic Orthodox Church 248~264
• Paul of Samosata, bishop of Antioch, adoptionist, condemned at 269 Council of Antioch
• Athanasius of Alexandria, c. 297~373, patriarch of Alexandria, defender of the Trinitarian doctrine
• Donatus Magnus, bishop of Carthage, (+355), leader of the Donatists from 313
• Lactantius, apologist ~317
• Arnobius, apologist ~330
• Eusebius, wrote History of the Church ~325
• Augustine of Hippo, 354-430, Latin church father, wrote Confessions and City of God

The Councils of Alexandria started in 231 AD as a council of bishops and priests met at Alexandria, Egypt, called by Bishop Demetrius for the purpose of declaring Origen of Alexandria unworthy of the office of teacher, and of excommunicating him.

The term "Great Church" (Latin: ecclesia magna) is used in the historiography of early Christianity to mean the period of about 180 to 313, between that of primitive Christianity and that of the legalization of the Christian religion in the Roman Empire, corresponding closely to what is called the Ante-Nicene Period. "It has rightly been called the period of the Great Church, in view of its numerical growth, its constitutional development and its intense theological activity."

The Great Church, also called the catholic (i.e., universal) Church, has been defined also as meaning "the Church as defended by such as Ignatius of Antioch, Irenaeus of Lyons, Cyprian of Carthage, and Origen of Alexandria and characterized as possessing a single teaching and communion over and against the division of the sects, e.g., gnosticism, and the heresies".

A Christian Hebraist is a scholar of Hebrew texts who approaches the works from a Christian perspective. The main area of study is the Hebrew text of the Bible (known as the Old Testament to Christians and as the Tanakh to Jews), but Christians have occasionally taken an interest in the Talmud and the Kabbalah.

The discipline has long been a site of Jewish–Christian intellectual interaction. The early church fathers got their knowledge of Hebrew traditions (Masoretic, Midrashim and Aggadah) from Jewish teachers. That is seen especially in the exegesis of Justin Martyr, Aphraates, Ephraem Syrus and Origen of Alexandria. Jerome's teachers are even mentioned by name such as Bar Ḥanina (Hananiah). In the Middle Ages, Christian converts from Judaism provided a key source of Hebrew education, as native Christians rarely learned the language. As the Renaissance and Enlightenment proceeded, the discipline increasingly came to investigate extrabiblical texts, and eventually became a branch of philology.

Christianity arrived to Africa in the 1st century AD; as of 2024, it is the largest religion on the continent. Several African Christians influenced the early development of Christianity and shaped its doctrines, including Tertullian, Perpetua, Felicity, Clement of Alexandria, Origen of Alexandria, Cyprian, Athanasius and Augustine of Hippo. In the 4th century, the Aksumite empire in modern-day Ethiopia and Eritrea became one of the first regions in the world to adopt Christianity as its official religion, followed by the Nubian kingdoms of Nobatia, Makuria and Alodia and several Christian Berber kingdoms.

The Islamic conquests into North Africa brought pressure on Christians to convert to Islam due to special taxation imposed on non-Muslims and other socio-economic pressures under Muslim rule, although Christians were widely allowed to continue practicing their religion. The Eastern Orthodox Church of Alexandria and Coptic Orthodox Church of Alexandria (which separated from each other during the Chalcedonian Schism) in Egypt and the Orthodox Tewahedo Church survived Muslim invasion. Islamization of Muslim-ruled territory occurred progressively over the next few centuries, though this process is not fully understood by historians. Restrictions on church building and demolition of churches in Egypt, along with occasional persecutions such as during the reign of al-Hakim (996–1021), put additional pressure on Copts in Egypt. In the Middle Ages, the Ethiopian Empire was the only region of Africa to survive as a Christian state after the expansion of Islam. The Ethiopian church held its own distinct religious customs and a unique canon of the Bible. Therefore, the Ethiopian church community is globally unique in that it wasn't Christianised through European missionaries, but was highly independent and itself spread missionaries throughout the rest of Africa prior to the contact of European Christians with the continent.