The Kingdom of Northumbria was formed by the union of the kingdoms of Bernicia (north of the River [[River Tees|Tees]]) and Deira (south of the Tees, roughly corresponding with the county of [[Yorkshire]]. Berniccia was traditionally founded by the Anglian chieftain Ida who seized the coastal strong point of Bamburgh in AD 547, and from that point conquered what is now modern [[Northumberland]]. More recent scholarship suggests that Bernicia developed as a Celtic-Anglian kingdom, with centres of kingship at Bamburgh, Yeavering and Millfield. | The Kingdom of Northumbria was formed by the union of the kingdoms of Bernicia (north of the River [[River Tees|Tees]]) and Deira (south of the Tees, roughly corresponding with the county of [[Yorkshire]]. Berniccia was traditionally founded by the Anglian chieftain Ida who seized the coastal strong point of Bamburgh in AD 547, and from that point conquered what is now modern [[Northumberland]]. More recent scholarship suggests that Bernicia developed as a Celtic-Anglian kingdom, with centres of kingship at Bamburgh, Yeavering and Millfield. |