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History of Ireland (400–800)

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Title: History of Ireland (400–800)  
Author: World Heritage Encyclopedia
Language: English
Subject: History of Ireland, Celtic Christianity, Protohistory of Ireland, Gaelic Ireland, History of the Republic of Ireland
Collection: Christianization, Early Middle Ages, History of Ireland, History of Ireland by Period
Publisher: World Heritage Encyclopedia

History of Ireland (400–800)

The early medieval history of Ireland, often called Early Christian Ireland, spans the 5th to 8th centuries, from the gradual emergence out of the protohistoric period (Ogham inscriptions in Primitive Irish, mentions in Greco-Roman ethnography) to the beginning of the Viking Age. The period notably includes the Hiberno-Scottish mission of Christianized Ireland to pagan Great Britain and Europe.


  • Overview 1
  • Early Christian history 2
    • Ecclesiastical history 2.1
    • Political history 2.2
  • See also 3
  • References 4
  • Bibliography 5
  • External links 6


At the start of the period Ireland had emerged from a mysterious decline that archaeological evidence suggests had hit population levels and standards of living from c. 100 BC to c. 300 AD, called the Irish Dark Age by Thomas Charles-Edwards. The population was entirely rural and dispersed, with small ringforts the largest centres of human occupation. Some 40,000 of these are known, while there may have been as many as 50,000, and "archaeologists are agreed that the vast bulk of them are the farm enclosures of the well-to-do of early medieval Ireland". Souterrains, underground passages and chambers for hiding in or escaping through, are common.[1] It is likely that raiding Britain for slaves and other loot gave an important boost to an otherwise almost entirely agricultural economy. The lakeside enclosures called crannogs continued to be used and seem especially associated with crafts.[2]

The older view that early medieval Irish farming concentrated on livestock has been overturned by pollen studies and other evidence, and it is now clear that cereal farming was increasingly important from about 200 AD onwards, with barley and oats more important crops than rye, wheat and others.[3] However cattle were greatly prized, and cattle-raiding constituted a large part of warfare, so that cattle needed the constant presence of a herdsman in daylight hours, and were put in an enclosure at night. By the end of the period the largest herds were probably those of monasteries. However, generally mild Irish winters seem to have meant they were never put in roofed shelters in winter, although young calves might spend a period in the house.[4] There was very considerable clearance of forests in the early part of the period, such that by 800 large tracts of forest appear to have been rare, and the native Scots Pine cleared almost to extinction; the large areas of bogland were harder for the medieval Irish to affect.[5]

By 800 small towns had started to form around some of the larger monasteries, such as Trim and Lismore, and some kings were based in them, but the foundation of larger towns by the Vikings had yet to occur. Otherwise kings lived in ringforts larger than the norm, but generally similar; however the possession of luxury objects such as elaborate Gaelic brooches was much greater among royalty.[6] The latter part of the period was the peak of the Irish contribution to Insular art, whose surviving products include illuminated manuscripts, most famously the Book of Kells, brooches, which were worn by clergy as well nobles, carved stone high crosses, and other isolated survivals of metalwork, such as the Derrynaflan Hoard and Ardagh Hoard.

Early Christian history

Recorded Irish history begins with the introduction of Christianity and Latin literacy, beginning in the 5th century or possibly slightly before. When compared to neighbouring Insular societies, early Christian Ireland is well documented, at least for later periods, but these sources are not easy to interpret. Many questions remain unanswered and the study of early Christian Ireland continues to produce new theories and new discoveries. Since the later 19th century, when scholars such as Kuno Meyer and Whitley Stokes applied an increasingly rigorous approach to the study of written sources, a great deal of new information has been extracted from the written material. New fields, such as paleobotany, have contributed to the debate, while the volume of archaeological evidence has increased.

Ecclesiastical history

Gallarus Oratory, one of the earliest churches built in Ireland

The first reliable historical event in Irish history, recorded in the Chronicle of Prosper of Aquitaine, is the ordination by Pope Celestine I of Palladius as the first bishop to Irish Christians in 431 – which demonstrates that there were already Christians living in Ireland. Prosper says in his Contra Collatorem that by this act Celestine "made the barbarian island Christian", although it is clear the Christianization of the island was a longer and more gradual process. The mission of Saint Patrick is traditionally dated around the same time – the earliest date for his arrival in Ireland in the Irish annals is 432 – although Patrick's own writings contain nothing securely dateable.[7] It is likely that Palladius' activities were in the south of Ireland, perhaps associated with Cashel, while Patrick's were later, in the north, and associated with Armagh.

By the early 6th century the church had developed separate dioceses, with bishops as the most senior ecclesiastical figures, but the country was still predominantly pagan. The High Kings of Ireland continued pagan practices until the reign of Diarmait mac Cerbaill ca. 558, traditionally the first Christian High King. The monastic movement, headed by abbots, took hold in the mid 6th century, and by 700 Ireland was at least nominally a Christian country, with the church fully part of Irish society. The status of ecclesiastics was regulated by secular law, and many leading ecclesiastics came from aristocratic Irish families. Monasteries in the 8th century even went to war with each other.[8]

From the 7th century on, Irish churchmen such as Columbanus and Columba were active in Gaul, in Scotland and in Anglo-Saxon England. The mixing of Irish, Pictish and Anglo-Saxon styles created the Insular style of art, represented by the Lindisfarne Gospels and the Book of Kells. Ireland's reputation for scholarship was such that many scholars travelled from Britain and the European mainland to study in Irish schools.

Political history

Eoin MacNeill identified the "oldest certain fact in the political history of Ireland" as the existence in late prehistory of a pentarchy, probably consisting of the cóiceda or "fifths" of the Ulaid (Ulster), the Connachta (Connacht), the Laigin (Leinster), Mumu (Munster) and Mide (Meath), although some accounts discount Mide and split Mumu in two.[9] However, by the dawn of history this pentarchy no longer existed. The rise of new dynasties, notably the Uí Néill in the north and midlands and the Eóganachta in the south-west, changed the political landscape. The Uí Néill, or their parent group the Connachta, reduced the former fifth of the Ulaid to counties Down and Antrim in the 4th of 5th century, establishing the tributary kingdom of the Airgíalla in the centre and the Uí Néill kingdom of Ailech in the west of the old province. Early Irish annals also show regular warfare between the Uí Néill and the Laigin in the midlands, with the Uí Néill conquering as far south as the Kildare/Offaly border, and claiming the kingship of Tara, beginning to be conceptualised as the High Kingship of Ireland. This led to a new division of the country into two-halves, Leth Cuinn, "Conn's half" after Conn Cétchathach, supposed ancestor of the Uí Néill and Connachta, in the north, and Leth Moga, "Mug's half", after Mug Nuadat, supposed ancestor of the Eoganachta, in the south. Dynastic propaganda claimed this was a traditional division dating back to the 2nd century, but it probably originated in the 8th, at the height of Uí Néill power.[10]

See also


  1. ^ Ó Cróinín, 237–249, 550 (quoted) to 553
  2. ^ Ó Cróinín, 257–259
  3. ^ Ó Cróinín, 264–265, 559–563
  4. ^ Ó Cróinín, 549
  5. ^ Ó Cróinín, 568–573
  6. ^ Ó Cróinín, 550–553
  7. ^ Dáibhí Ó Cróinín, Early Medieval Ireland 400–1200, Longman, 1995, pp. 1, 14–40
  8. ^ Kathleen Hughes, "The church in Irish society, 400–800", in Dáibhí Ó Cróinín (ed.), A New History of Ireland Vol 1: Prehistoric and Early Ireland, Oxford University Press, 2005, pp. 301–330
  9. ^ Eoin MacNeill, Phases of Irish History, Dublin, 1920, pp. 98–132
  10. ^ Dáibhí Ó Cróinín, "Ireland, 400–800", in Dáibhí Ó Cróinín (ed.), A New History of Ireland Vol 1: Prehistoric and Early Ireland, Oxford University Press, 2005, pp. 182–234


  • R.F. Foster (ed.) (1989). The Oxford Illustrated History of Ireland. Oxford: Oxford University Press.  
  • Kenneth Neill (1979). The Irish people. An illustrated history. Dublin: Gill & Macmillan.  
  • Ó Cróinín, Dáibhí (2008). A New History of Ireland: Prehistoric and early Ireland, (Volume 1 series), Oxford University Press, ISBN 0-19-922665-2
  • Brian de Breffny (ed.) (1977). The Irish World. London: Thames & Hudson.  

Main source for the workings of civil society of the age:

  • Donncha O'Corràin (1972). Ireland before the Normans. The Gill history of Ireland. Dublin: Gill & Macmillan.  

Main source for militaria of this age:

  • David Nicolle (1984). Arthur and the Anglo-Saxon wars. Men-at-Arms series 154. London: Osprey. 

External links

  • [3][4]
  • Old Irish kingdoms and clans
  • Ireland's history in maps
  • A Smaller Social History of Ancient Ireland by P. W. Joyce
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