Formation and episcopate
Finan was an Irishman who received his monastic training at Iona Abbey in Scotland, the island community founded by Saint Columba that served as the mother house of the Northumbrian mission. From that tradition he came to Lindisfarne, the island monastery and episcopal seat off the Northumbrian coast established by Saint Aidan.
When Aidan died, Finan was chosen to succeed him as the second bishop of Lindisfarne, governing the see from 651 until his own death ten years later. He built a cathedral at Lindisfarne in the Irish fashion, constructed of hewn oak with a thatched roof; the church was later dedicated to Saint Peter by Archbishop Theodore of Tarsus.