Apostolic Fathers in the context of "Christian literature"

Christianity in the ante-Nicene period was the period in Christian history following the Apostolic Age (1st century AD) up to the First Council of Nicaea (325 AD). Although the use of the term Christian (Koine Greek: Χριστιανός) is attested in the Acts of the Apostles (80–90 AD), the earliest recorded use of the term Christianity (Koine Greek: Χριστιανισμός) is attested by the ante-Nicene Father and theologian Ignatius of Antioch (c. 107 AD).

While the Jewish–Christian community was centered in Jerusalem in the 1st century AD, Gentile Christianity spread widely in the 2nd century AD. One stream of Gentile Christianity (so-called "proto-Orthodox Christianity") that emerged in this period in the persons and theological positions of the Apostolic Fathers would eventually become the international Great Church. Proto-Orthodox Christianity placed importance on the sacrifice of Jesus on the cross as saving humanity, and described Jesus as the incarnated Son of God come to Earth. The 2nd and 3rd centuries AD saw a sharp separation between Jewish Christianity and Gentile Christianity, with the latter being derived from the teachings of the Apostle Paul. There was an explicit rejection of Second Temple Judaism and Jewish culture by the end of the 2nd century, with a growing body of anti-Jewish Christian literature. Many doctrinal variations in this era defy neat categorizations, as various forms of Christianity interacted in a complex fashion.

Ignatius of Antioch (/ɪɡˈneɪʃəs/; Ancient Greek: Ἰγνάτιος Ἀντιοχείας, romanized: Ignátios Antiokheías; died c. 108/140), also known as Ignatius Theophorus (Ἰγνάτιος ὁ Θεοφόρος, Ignátios ho Theophóros, 'the God-bearing'), was an early Christian writer and Patriarch of Antioch. While en route to Rome, where he met his martyrdom, Ignatius wrote a series of letters. This correspondence forms a central part of a later collection of works by the Apostolic Fathers. He is considered one of the three most important of these, together with Clement of Rome and Polycarp. Although the authenticity of his letters has been questioned, they continue to serve as an example of early Christian theology, and address important topics including ecclesiology, the sacraments, and the role of bishops.

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 term proto-orthodox Christianity or proto-orthodoxy describes the early Christian movement that was the precursor of Christian orthodoxy. Older literature often referred to the group as "early Catholic" in the sense that their views were the closest to those of the more organized "Catholic" Church that was the State church of the Roman Empire during the 4th and 5th centuries. The term "proto-orthodox" was coined by Bentley Layton, a scholar of Gnosticism and a Coptologist at Yale, but is often attributed to New Testament scholar Bart D. Ehrman, who has popularized the term by using it in books for a non-academic audience. Ehrman argues that when this group became prominent by the end of the third century, it "stifled its opposition, it claimed that its views had always been the majority position and that its rivals were, and always had been, 'heretics', who willfully 'chose' to reject the 'true belief'."

Although early Christianity had many diverse sects and doctrines, critics of the stance of downplaying the proto-orthodox's prominence (such as Larry W. Hurtado), generally argue that the writings of the Catholic anti-heresiologists condemning others as heretics were still essentially accurate: that of all the Christian groups, the "proto-orthodox" has the most common ground with the immediate followers of Jesus in the Apostolic Age and Christianity in the 1st century, and were indeed the most common variety of Christianity even then.

Clement of Rome (Latin: Clemens Romanus; Ancient Greek: Κλήμης Ῥώμης, romanized: Klēmēs Rōmēs; died c. 100), also known as Pope Clement I, was the Bishop of Rome in the late first century. He is considered to be the first of the Apostolic Fathers of the Church.

Little is known about Clement's life. Tertullian claimed that Clement was ordained by Saint Peter. Early church lists place him as the second or third bishop of Rome. Eusebius, in his book Church History mentioned Clement as the third bishop of Rome and as the "co-laborer" of Paul. In Against Heresies, Irenaeus described Clement as the successor to Anacletus, who was the third bishop of Rome, and as a personal acquaintance of the Apostles. According to the Annuario Pontificio, Clement was the fourth bishop of Rome, holding office at the very end of the 1st century. It is likely that Clement died in exile, and was possibly martyred. According to apocryphal stories dating back to the 4th century by authors such as Rufinus, Clement was imprisoned by Roman Emperor Trajan, and was executed by being tied to an anchor and thrown into the sea. The Liber Pontificalis states that Clement died in Greece in the third year of Trajan's reign, or 100.

Polycarp (/ˈpɒlikɑːrp/; Greek: Πολύκαρπος, Polýkarpos; Latin: Polycarpus; AD 69 – 155) was a Christian bishop of Smyrna. According to the Martyrdom of Polycarp, he died a martyr, bound and burned at the stake, then stabbed when the fire failed to consume his body. Polycarp is regarded as a saint and Church Father in the Eastern Orthodox Church, the Catholic Church, Oriental Orthodox Churches, Lutheranism, and Anglicanism.

Both Irenaeus and Tertullian say that Polycarp had been a disciple of John the Apostle, one of Jesus's disciples. In On Illustrious Men, Jerome similarly writes that Polycarp was a disciple of John the Apostle, who had ordained him as a bishop of Smyrna. Polycarp is regarded as one of three chief Apostolic Fathers, along with Clement of Rome and Ignatius of Antioch.