Menu Travels in Time

800 AD to 1100 AD




800 AD to 900 AD

c.800 AD 'Félire Óengusso', a martyrology in Old Irish verse, by Óengus mac Óengobann 'the Culdee'; Stowe Missal written.

802 AD Iona raided by Vikings.

806 AD Iona raided by Vikings; chief relics removed to Kells.

807-813 AD Vikings raid western seaboard.

812 AD Viking defeat by the Umhall ( pronounced oowel) of County Mayo (Clew Bay area)

813 AD Vikings return and take revenge killing the local King, Coscrach.

806 AD The Community of Iona to the number of 68, is slain by the heathens.

823 AD Bangor raided by Vikings; bishops and scholars killed.

Sceilig Mhichil attacked by the Norse.

824 AD Bangor again raided by Vikings; Skellig raided  by Vikings.


c. 820 AD Norwegian immigration to Ireland.

825 AD Dicuil's Geography, 837-876 AD Intense Viking activity in Ireland: semi - permanent bases established 'De mensura orbis terraum', written at Frankish court; Dúngal teaches at Pavia.

837-876 AD Intense Viking activity in Ireland: semi - permanent bases established

841 AD Permanent Norse encampment (longphort) at Annaghassen, County Louth, and at Dublin (nucleus of later kingdom of Dublin)

845 AD Viking leader Turgéis drowned by Mael Sechnaill mac Máele Ruanaid, king of Mide. Johannes Scottus Eriugena joins royal school at Laon.

848-858 AD Sedulous Scottus at Liège.

853 AD Olaf (Amlaíb) 'son of king of Laithlind' assumes sovereignty over Norse kingdom of Dublin.




825 AD Viking raiders attack Iona killing abbot Blathmac and the rest of the brothers 'with mad savagery' while looking for treasure.

842 AD Cinaed mac Ailpín acquires control of Pictland to create what will become the kingdom of the Scots.  He may have had Dál Riata ancestry, but Dál Riata territory was probably mostly under Norse control by this time.

c.849 AD Some of the relics of St Columba are transferred from Dál Riata to Dunkeld, giving the saint's blessing to the new kingdom of Scotland and its ruling dynasty.

861-862 AD Áed Findliath, king of Ailech, allies with Dublin Norse against high-king.

With his victory in the battle of Hafrsfjord 872 AD, king Harald Hårfagre (Fair-haired) made great progress in the process of uniting Norway into one kingdom. He chose Avaldsnes, on the west coast, as his residence (according to Snorres saga).


876-916 AD 'Forty years of peace' relative respite from Vikings attacks on Ireland.

870-930 AD The Icelandic Landnåma Period starts. Viking settlers reach Iceland

North Norwegian uprising against king Harald Hårfagres alliance with Håkon Grjotgardson (Earl of Lade). Several northern cheiftains leave their homes for new settlements on Iceland. Among them Olaf Tvennumbruni from the island Lofotr (Vestvågøy) in the Lofoten Isles left together with his family for Iceland, and took land at Skeid. Olaf supposedly was an important man within society through his religious functions.

871-899 AD Ottar's (Othere) voyage to the White Sea? & London.




900 AD to 1000 AD

900-c.1050 AD Early Middle Irish linguistic period. Decline of Latin learning; elaboration of Irish native traditions; dindsheanchas poetry.

900-c.911 AD Hiberno- Norse infiltration of Cumberland, Lancashire, and Cheshire.

900 AD  Secularisation of monastic schools.

908 AD Flann Sinna, king of Tara, defeats Cormac mac Cuilennáin,  king bishop of Cashel, at Belach Mughna Co. Carlow.

c.909x916 AD Flann's cross (Cross of Scriptures ) erected at Clonmacnoise.

914 AD Large Viking fleet establishes a base at Waterford.

916-937 AD Reign of High-king Niall Glúndub.???

920- 952 AD Dublin kings strike coins at York.

921-926/7 AD Sitric, grandson of Ivar, king of Dublin, reigns in York.

922 AD Foundation of Norse town in Limerick.

c.924 AD Muiredach's cross at Monasterboice.



900 AD The term Alba, for 'Scotland', first appears during the rule of Constantine. For the first time, kingship depends on dynastic succession, descent from Cinaed mac Ailpín.

964 AD Rise of Dál Cais: Mathgamain mac Cennétig seizes kingship of Cashel.

970-980 AD Saint Catroe of Armagh founds monastery at Metz.

975 AD Death of Cináed ua hArtacáin, 'chief poet of Ireland'.

Monastery of Saint Martin's at Cologne assigned to Irish monks.

978 AD Brian Bóruma mac Cennétig defeats Máel Muad mac Brain and becomes king of Munster.

980 AD Mael Sechnaill II captures Dublin.

981 & 989 AD Mael Sechnaill II captures Dublin for the third time; seizes ring of Thor and sword of Carlus.

999 AD Brian Bóruma defeats Máel Mórda, king of Leinster, and Sitric Silkbeard, at Glen Máma, near Saggart, Co Dublin.

Late 10th C, Viking hoard of 25 silver bracelets found on the eastern shore of Clew Bay.

950 AD King Håkon Adalstenfostre's first attempt to christianize Norway

On the west coast of Norway 60 stone-crosses are erected before 995 AD. Similar crosses are found in Britain and Ireland, but not known from other places? Also graves indicate contact with British Isles, mainly on the southwest coast of Norway, interpreted as a result of expansion from Rogaland to Ireland.

Olav Tryggvason left England, went over to the Faeroes and set ahead against Norway in the summer of AD 995, to claim the throne of Norway and to bring Christianity to the country.

King Olav Tryggvason's journey to Northern Norway at the end of 10th century AD. The killing of two powerful northern Norwegian chieftains using their pagan belief to legitimize his actions. One of these chieftains (Tore Hjort) came from the Lofoten Isles.


960-962 AD Christian King Harald Blåtann - King of Denmark re-establish the Danish influence in Norway

970s AD The Kingdom of the Isles emerges, Gaelic-speaking Nosremen, including the Isle of Man and most of the Hebrides.

980 AD Norse ruler Olaf Cuarán, dies on pilgrimage in Iona - a Christian, therefore.

986 AD The Annals of Ulster record: 'The Danes arrived on the coast of Dal Riata, with three ships, and seven score of them were tortured and others sold.   Iona was plundered by the Danes on Christmas night, and they killed the abbot and fifteen of the elders of the monastery.




1000 AD to c.1100 AD

Brian Bóruma captures Dublin (January) and burns Wood of Thor: Sitric Silkbeard submits.

1002 AD Máel Sechnaill II acknowledges Brian Bóruma as High-king of Ireland.

1002 AD Brian Bóruma visits Armagh: leaves 20 ounces of gold on the Altar and confirms the primacy of Armagh (entry by his secretary Máel Suthain in Book of Armagh).

1006 AD Brian Bóruma claims hostages from north: undisputed high-king of Ireland.

1014 AD Battle of Clontarf (23 April., Good Friday ) : Munster forces under Brian Bóruma defeat and kill Máel Mórda, king of  Leinster, and Jarl Sigurd of Orkney, with much slaughter on both sides; Brian killed (buried at Armagh )

Máel Sechnaill II resumes high-kingship of  Ireland; continues till his death in 1022.

1022-1072 AD High-kingship in abeyance;

Age of scholarly activity; synthetic historians; compilation of 'Lebor Gabála'; translations of Latin epics into Irish; devotional literature.


A huge religious change emerged in the centuries around 1000 AD. 

1000 AD Iceland adopts Christianity

c. 1000 AD Three Norse gravestones on Iona, each bearing a cross.

1028 AD Sitric Silkbeard, king of Dublin, and Flannacán, king of Brega, go on pilgrimage to Rome.

1028x1036 AD Christ Church cathedral founded by Sitric and Dúnán, first bishop of Dublin.

c.1050-c.1200 AD Late Middle Irish linguistic period: reworking of traditional sagas; elaboration of pseudo-historical tracts; new recensions of genealogical tracts.

1074 AD Death of Dúnán first bishop of Dublin (May 6); Patricius (Gilla Pátraic) consecrated by Lanfranc; Lanfranc's letters to Toirrdelbach Ua Briain and Gofraid, king of Dublin, urging ecclesiastical reforms.


1030 AD This is the official date for when Norway was Christianised.  Olav Haraldsson was killed in the battle of Stiklestad, a battle against local pagans by one of the mighiest northern Norwegian cheiftains ever - Tore Hund. After his death he was  declared a martyr and made a saint by the church. His body was placed in the church at Nidaros.


1066 AD Harald Hardråde defeated by king Harold Godwinsson at the battle of Stamford Bridge.



1090-1130 AD Flowering of Romanesque metalwork.

1092 AD Manuscript of 'Annals of Inisfallen' written; continued by various hands right up until the 14th C.

10th-12th centuries

The building of Round Towers County Mayo:

  • Aghagower
  • Balla
  • Turlough
  • Killala
  • Meelick
  • Rosserk

Early in the year 1100 AD the building of a monastery at Selje was started, dedicated to the English saint Albanus (brother of Sunniva according to the tradition).

Church building in northern Norway from the 11th - 12th century.  Norway was divided into parishes and churches where built. In most cases the churches where built on older power centers, chietains farms or older pagan sacred places from the iron age.

Annual church gatherings at Vàgar in Lofoten with control over the church taxation from the winter-cod fisheries.

The Landnámabók and Islendingabók written by Are Frode around 1120 AD.

The Norse Sagaliterature was written during the 11th and 12th centuries.

1098 AD Magnus Barelegs, King of Norway, raids western Scotland, subjecting the western isles of Scotland to Norwegian rule, which lasted until 1266 AD

Mayo - Vestvågøy - Mid-Argyll

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