Medieval Irish literature

Early Irish literature is the oldest vernacular literature in Western Europe. The earliest existing examples of the written Irish language are Ogham inscriptions dating from the 4th century. Extant manuscripts do not go back farther than the 8th century. Two works written by Saint Patrick, his Confessio and Letter to Coroticus were written in Latin some time in the 5th century, and preserved in the Book of Armagh.

It is unclear when literacy first came to Ireland. The earliest Irish writings are inscriptions, mostly simple memorials, on stone in the ogham alphabet, the earliest of which date to the 4th century. The Latin alphabet was in use by 431, when the fifth century Gaulish chronicler Prosper of Aquitaine records that Palladius was sent by Pope Celestine I as the first bishop to the Irish believers in Christ.Pelagius, an influential British heretic who taught in Rome in the early 5th century, fragments of whose writings survive, is said by Jerome to have been of Irish descent.Coelius Sedulius, the 5th century author of the Carmen Paschale, who has been called the "Virgil of theological poetry", was probably also Irish: the 9th-century Irish geographer Dicuil calls him noster Sedulius ("our Sedulius"), and the Latin name Sedulius usually translates the Irish name Siadal.

Two works written by Saint Patrick, his Confessio ("Declaration", a brief autobiography intended to justify his activities to the church in Britain) and Epistola ("Letter", condemning the raiding and slaving activities in Ireland of a British king, Coroticus), survive. They were written in Latin some time in the 5th century, and preserved in the Book of Armagh, dating to around 812, and a number of later manuscripts. The 6th-century saint Colum Cille is known to have written, but only one work which may be his has survived: the psalter known as the Cathach or "Book of Battles", now in the Royal Irish Academy. Another important early writer in Latin is Columbanus (543-615), a missionary from Leinster who founded several monasteries in continental Europe, from whose hand survive sermons, letters and monastic rules, as well as poetry attributed to him whose authenticity is uncertain. The earliest identifiable writer in the Irish language is Dallán Forgaill, who wrote the Amra Coluim Chille, a poetic elegy to Colum Cille, shortly after the subject's death in 597. The Amra is written in archaic Old Irish and is not perfectly understood. It is preserved in heavily annotated versions in manuscripts from the 12th century on. Only a little later, in the early 7th century, Luccreth moccu Chiara, a Kerryman, wrote poems recording the legendary origins of Munster dynasties, including Conailla Medb michuru ("Medb enjoined illegal contracts"), which contains the oldest surviving reference to characters and events from the Ulster Cycle.

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