AIDAN, or SEDAN, first bishop of Lindisfarne, a monk of Hii (Iona), was sent by the abbot Senegi to Northumbria, at the request of King Oswald, A.D.
He restored Christianity, and in accordance with the traditions of Irish episcopacy chose the island of Lindisfarne, close to the royal city of Bamborough, as his see.
From this same solitary outpost went forth the illustrious Aidan to plant another Iona at Lindisfarne, which, " long after the poor parent brotherhood had fallen to decay, expanded itself into the bishopric of Durham."
Bede, speaking of a church built by Finan at Lindisfarne, says, " nevertheless, after the manner of the Scots, he made it not of stone but of hewn oak and covered it with reeds."
(For early history see Lothian; Northumbria; Strathclyde.) In the 12th century were founded the abbeys of Hexham and Alnwick, the priory church of Lindisfarne and the cathedral of Carlisle on the English side, and on the Scottish the abbeys of Jedburgh, Kelso, Melrose and Dryburgh.