Christianity Spreads Across the Roman World
Christian communities multiplied around the Mediterranean and beyond, carrying apostolic teaching and biblical books into new languages and cultures.

The History of the Bible
Between AD 100 and 500, Christianity spread through the Roman world and beyond while often facing hostility, persecution, and theological controversy. Churches inherited the Hebrew Scriptures and the apostolic writings, read them in worship, copied them for new congregations, translated them into additional languages, and defended their teaching against rival claims. This period did not create the authority of Scripture; it made increasingly explicit which books had already been received as prophetic and apostolic.
The core of the New Testament was recognized remarkably early. The four Gospels, Acts, Paul's letters, and several General Epistles were used across widely separated churches during the second century. Questions persisted longer around a smaller group of books, including Hebrews, James, Second Peter, Second and Third John, Jude, and Revelation. Other respected Christian works were useful for instruction but were not finally received as apostolic Scripture throughout the church. Writers such as Irenaeus, Origen, Eusebius, and Athanasius provide important evidence for this process of recognition.
Surviving manuscripts make the history tangible. Early papyri preserve portions of the Gospels and Paul's letters, while fourth- and fifth-century parchment codices contain large portions of the Christian Bible. These witnesses display ordinary copying variations, corrections, and different arrangements, yet they also demonstrate the broad and early transmission of the New Testament text.
Translation carried Scripture into Latin, Syriac, Coptic, Gothic, and other languages. Jerome's Latin Vulgate and the Syriac Peshitta became especially influential. Meanwhile, Christians adopted the codex, or leaf-book, on an unusually large scale. The combination of recognized books, expanding translation, and durable book production prepared the Bible for its long medieval history.
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The church expanded from a persecuted minority into a legally recognized and eventually favored religion of the Roman Empire. Political change, doctrinal controversy, missionary growth, and councils affected how Scripture was copied, interpreted, and distributed.
Christian communities multiplied around the Mediterranean and beyond, carrying apostolic teaching and biblical books into new languages and cultures.
Christians periodically faced imprisonment, confiscation, exile, and execution for refusing emperor worship and remaining loyal to Christ.
Imperial policy granted Christians legal toleration and ended the Great Persecution.
Bishops gathered at Nicaea to confess the Son as truly divine and to answer the teaching of Arius.
Churches recognized books through their apostolic origin, agreement with the received rule of faith, and widespread use. The central books were accepted early; discussion continued around a smaller number. Later lists and councils confirmed this recognition rather than creating scriptural authority.
Marcion rejected the Old Testament and used an edited Gospel of Luke with ten Pauline letters, provoking a strong Christian response.
The Muratorian fragment lists most New Testament books and distinguishes received apostolic writings from rejected works.
Irenaeus treated Matthew, Mark, Luke, and John as the church's authoritative fourfold Gospel.
Origen used the four Gospels and apostolic writings extensively while acknowledging questions surrounding several books.
Eusebius classified writings as recognized, disputed, or rejected and showed that most New Testament books were already broadly accepted.
Athanasius provided the earliest surviving list that exactly matches the twenty-seven books of the modern New Testament.
North African church councils affirmed lists corresponding to the twenty-seven-book New Testament and a broader Old Testament collection used in their churches.
Papyri and great parchment codices preserve early witnesses to the New Testament and Greek Old Testament. Their agreements and variations enable textual comparison and show that Scripture circulated widely across regions and generations.
A small papyrus fragment from John preserves parts of Jesus' trial before Pilate.
P46 preserves an early collection of Pauline letters in a single papyrus codex.
P66 preserves most of the Gospel of John in an early papyrus codex with numerous corrections.
P75 preserves substantial portions of Luke and John and closely resembles the later text of Codex Vaticanus.
Codex Vaticanus is a major Greek parchment Bible containing most of the Septuagint and New Testament.
Codex Sinaiticus preserves the earliest complete New Testament together with much of the Greek Old Testament.
As Christianity crossed linguistic boundaries, translators rendered Scripture into Latin, Syriac, Coptic, Gothic, and other languages. These versions served local churches and preserve valuable evidence for the biblical text known to their translators.
Latin-speaking Christians translated biblical books from Greek before the standardized influence of Jerome's Vulgate.
Syriac-speaking Christians received the Gospels through Tatian's harmony and through translations preserving the four separate accounts.
Egyptian Christians translated Scripture into Coptic dialects, especially Sahidic and Bohairic.
Ulfilas created a Gothic alphabet and translated much of the Bible for the Gothic people.
The Peshitta became the standard Syriac Bible for churches of the Syriac tradition.
Jerome revised the Latin Gospels and translated most of the Old Testament from Hebrew, creating the foundation of the Vulgate.
Christians strongly favored the codex over the scroll, developed visual conventions such as sacred-name abbreviations, and eventually produced large parchment Bibles. Copying remained human work subject to error, review, and correction, yet it was undertaken with serious care.
Christians commonly copied Scripture in the codex, a book of leaves bound along one edge, rather than in the traditional scroll.
Christian scribes used distinctive contracted forms, called nomina sacra, for names and titles such as God, Lord, Jesus, and Christ.
Legal toleration and church patronage supported production of durable codices containing large portions of both Testaments.