page_title: Constantine II of Scotland
section_title: Britain and Ireland at the end of the 9th century
hierarchical_section_title: Constantine II of Scotland / Britain and Ireland at the end of the 9th century
caption_attribution_description: Work derived from Image:Scotland Land Use by height.png. Licensing per that image. Created by user:SFC9394. Licensed CCSA2.5 and GFDL per original work.
context_page_description: Constantine, son of Áed was an early King of Scotland, known then by the Gaelic name Alba. The Kingdom of Alba, a name which first appears in Constantine's lifetime, was situated in modern-day Scotland.
  The core of the kingdom was formed by the lands around the River Tay. Its southern limit was the River Forth, northwards it extended towards the Moray Firth and perhaps to Caithness, while its western limits are uncertain. Constantine's grandfather Kenneth I of Scotland was the first of the family recorded as a king, but as king of the Picts. This change of title, from king of the Picts to king of Alba, is part of a broader transformation of Pictland and the origins of the Kingdom of Alba are traced to Constantine's lifetime.
  His reign, like those of his predecessors, was dominated by the actions of Viking rulers in the British Isles, particularly the Uí Ímair. During Constantine's reign the rulers of the southern kingdoms of Wessex and Mercia, later the Kingdom of England, extended their authority northwards into the disputed kingdoms of Northumbria.
context_section_description: In 899 Alfred the Great, king of Wessex, died leaving his son Edward the Elder as ruler of England south of the River Thames and his daughter Æthelflæd and son-in-law Æthelred ruling the western, English part of Mercia. The situation in the Danish kingdoms of eastern England is less clear. King Eohric was probably ruling in East Anglia, but no dates can reliably be assigned to the successors of Guthfrith of York in Northumbria. It is known that Guthfrith was succeeded by Sigurd and Cnut, although whether these men ruled jointly or one after the other is uncertain. Northumbria may have been divided by this time between the Viking kings in York and the local rulers, perhaps represented by Eadulf, based at Bamburgh who controlled the lands from the River Tyne or River Tees to the Forth in the north.
  In Ireland, Flann Sinna, married to Constantine's aunt Máel Muire, was dominant. The years around 900 represented a period of weakness among the Vikings and Norse-Gaels of Dublin. They are reported to have been divided between two rival leaders. In 894 one group left Dublin, perhaps settling on the Irish Sea coast of Britain between the River Mersey and the Firth of Clyde. The remaining Dubliners were expelled in 902 by Flann Sinna's son-in-law Cerball mac Muirecáin, and soon afterwards appeared in western and northern Britain.
  To the south-west of Constantine's lands lay the kingdom of Strathclyde. This extended north into the Lennox, east to the River Forth, and south into the Southern Uplands. In 900 it was probably ruled by King Dyfnwal.
  The situation of the Gaelic kingdoms of Dál Riata in western Scotland is uncertain. No kings are known by name after Áed mac Boanta. The Frankish Annales Bertiniani may record the conquest of the Inner Hebrides, the seaward part of Dál Riata, by Northmen in 849. In addition to these, the arrival of new groups of Vikings from northern and western Europe was still commonplace. Whether there were Viking or Norse-Gael kingdoms in the Western Isles or the Northern Isles at this time is debated.
caption: Some locations in northern Britain, late 9th and early 10th centuries. The dotted line marked A represents the southern boundary of the Kingdom of Alba, c. 890–950. The dotted line marked B represents the southern boundary of the Kingdom of Strathclyde, c. 925–945.
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