It was one of the most prestigious clerical positions in Dark Age Europe, and was visited by kings and bishops of the Picts, Franks and English.
[1] Iona's position as head of the Columban network (familia) of churches declined over time, with abbots based at Derry, Raphoe, Kells and Dunkeld.
Iona was re-endowed in 1203 by Raghnall mac Somhairle, son of Somerled, king of Argyll and the Isles.
During the abbacies of Diarmait and Indrechtach, almost certainly because of Viking attacks, the relics of Columba were moved to other monastic houses in the Columban familia, such as Kells, Raphoe and Dunkeld.
The position of abbot on Iona ceases to have the same significance within the Columban monastic familia, and many comarbai are not based on the island.