The Book of Kells is the high point of a group of manuscripts produced from the late 6th century through the early 9th century in monasteries in Ireland, Scotland and northern England, and in continental monasteries associated with Irish or English foundations-The Book of Columba. These manuscripts include the Cathach of Saint Columba, the Ambrosiana Orosius, a fragmentary gospel in the Durham cathedral library. From the early 8th century come the Durham Gospels, the Echternach Gospels, the Lindisfarne Gospels, and the Lichfield Gospels. Folio 27r from the Lindisfarne Gospels contains the incipit Liber generationis from the Gospel of Matthew.

Anglo-Saxon missionaries were instrumental in the spread of Germanic Christianity in the Frankish Empire during the 8th century, continuing the work of Hiberno-Scottish missionaries which had been spreading Celtic Christianity across the Frankish Empire as well as in Scotland and Anglo-Saxon England itself during the 6th century. The Anglo-Saxon mission began in Frisia, and spread south and east from there. The earliest monastery founded by Anglo-Saxons on the continent is Echternach (698). A Life was written by Alcuin and dedicated to the Abbot of Echternach.

Insular script was a medieval script system used in Ireland and Britain (Latin: insula, "island"). It later spread to Continental Europe in centres under the influence of Celtic Christianity. Insular script was spread to England by Irish missionaries; previously, uncial script had been brought to England by Augustine of Canterbury. The script was used not only for Latin religious books, but also for every other kind of book, including vernacular works. Examples include the Book of Kells, the Cathach of Saint Columba, the Ambrosiana Orosius, the Durham Cathedral Library A. II. 10. Gospel Book Fragment, the Book of Durrow the Durham Gospels, the Echternach Gospels, the Lindisfarne Gospels, the Lichfield Gospels, the St. Gall Gospel Book, and the Book of Armagh.

Ecternach Gospels

The Book of Armagh is a 9th century Irish manuscript. It is also known as the Canon of Patrick and the Liber Ar(d)machanus. It contains some of the oldest surviving specimens of Old Irish to Middle Irish. Old Irish first appears in the margins of Latin religious manuscripts dating as early as the 6th century with a large number of texts in manuscripts of the period such as Lebor na hUidre and the Book of Leinster. While Old Irish is the ancestor to Modern Irish, Scottish Gaelic, and Manx Gaelic. From the earlier Ogham alphabet in Ireland and western Britain dating as late as the 4th century. The inscription in the Ogham alphabet occurred during the discovery of the Kama Sutra and the Gupta period. The earliest text of the Kama Shastra tradition, said to have contained a vast amount of information in Sanskrit, is attributed to Nandi the sacred bull. The manuscript of the Book of Armagh was thought to have belonged to St. Patrick. There are 221 folios of vellum. The manuscript also includes significant portions of the New Testament including the Epistles of St. Paul, the Epistles of James, Peter, John, and Jude, the Book of Revelation, and the Gospels of Matthew, Mark, John, and Luke.

Codex Sinaiticus is a 4th century uncial manuscript of the Greek Bible, written between 330–350. Originally containing the whole of both Testaments, only portions of the Greek Old Testament or Septuagint survive along with a complete New Testament, the Epistle of Barnabas and portions of The Shepherd of Hermas. The books of the New Testament are arranged in this order: the four Gospels, the epistles of Paul, the Acts of the Apostles, the General Epistles, Revelation. Although when parts of Genesis and Book of Numbers were later found in the binding of other books, they were amicably sent to Tischendorf.. The Codex is currently regarded by the monastery and leading to the transfer of the codex to the Czar's possession. From the fourth century, Theodosius I, Roman Emperor made Christianity the offical religion of the Empire. Ulfilas apostle of the Goths was founded then and Arius founded Arianism.

The Codex Argenteus (or "Silver Bible") is a 6th century manuscript, originally containing bishop Ulfilas's 4th century translation of the bible into the Gothic language was probably written for the Ostrogothic King Theodoric the Great, either at his royal seate in Ravenna, or in the Po valley or at Brescia...

The Codex Theodosianus (Book of Theodosius) was a compilation of the laws of the Roman Empire under the Christian emperors since 312. A commission was established by Theodosius II in 429 and the compilation was published in 438. The legal code of the Roman Empire promulgated in 438 AD by the emperor Theodosius II of the East and accecpted by emperor Valentinian III of the West. theodosian Code was somewhat ineffectual and Roman law was organized further in the Corpus Iuris Civilis during the reign of Justinian I. The Code was designed to eliminate superfluous material and to organize the complex body of imperial constitutions that had been in effect since the time of the emperor Constantine I (306-337). It was derived primarily from two private collections: the Gregorian Code, or Codex Gregorianus, a collection of constitutions from the emperor Hadrian (117-138) down to Constantine compiled by the Roman jurist Gregorius in the fifth century; and the Hermogenian Code, or Codex Hermogenianus, a collection of the constitutions of the emperors Diocletian (284-305) and Maximian (285-305) prepared by the fifth-century jurist Hermogenes to supplement the Gregorian Code.

It was the Greek seafarer Pytheas, who as early as 300 BC refers to the islands Pretanikai Nesoi ("Pretanic Islands"), which Scott claims is based on the native name for Britain Ynis Prydain, which literally means Picts' Island. Before Gaelic dialects evolved in Ireland, some allege that the inhabitants spoke Ivernic, particularly in Munster. It receives its name from a Gallo-Belgic group known as the Iverni (later Érainn), attested in Ptolemy's 2nd century Geography. A ninth century dictionary Sanas Cormaic, under the names Iarnnbélrae, Iarnbélrae, and Iarmbérla, which, if treated as Old Irish, means "Iron-speech". It was created by Cormac mac Cuilleanáin (836-908), king-bishop of Munster; it is an encyclopaedic dictionary containing simple synonymous explanations in Irish or Latin of Irish words. These Brythonic loanwords as borrowings directly from Welsh, noting that Ogham inscriptions attest to an early Irish presence in Wales and before Cumbrian was as much a familiar dialogue, the sacred north and south was fully acquainted with given names. Ivernic speakers would have first diverged from Gaulish around 500 B.C. and survived a proposed Goidelic-speaking invasion of Ireland (sometime between 500 and 100 BC) and would since parallel newfound words apart from hagiographic ones. It was said to be still spoken by a minority in Munster at the time of Bede in about AD 700. However its speakers were eventually absorbed into the Goidelic-speaking population, and by the time the Vikings had established Limerick in about 850, the Ivernic and Goidelic languages had merged into Irish. Pictish in design from the Celtic "Ogham" script was not Celtic in context, but descriptively "Pritanic". Some Viking Age Ogham stones on Man and Shetland are in Old Norse, or at least contain Norse names.

The Book of Durrow is a 7th Century illuminated manuscript made either in Northumbria in Northern England or at Durrow Abbey near Durrow in County Offaly, Ireland. The Book of Durrow is a Gospel Book, of the text includes the Gospels of Matthew, Mark, Luke and John, plus several pieces of prefatory matter. It is 247 by 228 mm and contains 248 vellum folios. It was protected in 879. That yeare Pope John VIII recognized the Dukedom of Croatia as an independent state the yeare the Varangian Viking Rurik of Rus, ruler of Novgorod died. The earliest known cumdach was made to house and protect the Book of Durrow at the behest of King of Ireland Flann Sinna (879-916).

Insular script was a medieval script system used in Ireland and Britain (Latin: insula, "island"). It later spread to Continental Europe in centres under the influence of Celtic Christianity. The script developed in Ireland in the 7th century and was used as late as the 19th century, though its most flourishing period fell between 600 and 850.
Works written in Insular scripts commonly use large initial letters surrounded by red ink dots. Letters with ascenders (b, d, h, l, etc.) are written with triangular or wedge-shaped tops. The bows of letters such as b, d, p, and q are very wide. Insular script was spread to England by Irish missionaries; previously, uncial script had been brought to England by Augustine of Canterbury. Irish missionaries also brought the script to Europe, where they founded monasteries such as Bobbio; a city in the Piacenza province of the Emilia-Romagna region in northern Italy. The bishopric dates from 1014; the town became part of Savoy in 1748. Known to the ancients as Bobium or Ebovium, the Irish Saint Columbanus (It. Colombano) established a monastery sometime between 612 and 614. Merovingian script was a medieval script so called because it was developed in France during the Merovingian dynasty. Like Visigothic script, there are two different ti ligatures, representing two different sounds ("hard" and "soft") was one Laon type as other monasteries Luxeuil, Corbie, Chelles based unical. Along with resemblances to Carolingian and Visigothic, Merovingian shares some features with Beneventan script which resembles Visigoth unical features due to the common late Roman matrix to the original southern style. Beneventan scripts mostly associated with Italy south of Rome, but it was also used in Beneventan-influenced centres across the Adriatic Sea in Dalmatia.