When Bede was about 17 years old, Adomnán, the abbot of Iona Abbey, visited Monkwearmouth and Jarrow. Bede would probably have met the abbot during this visit, and it may be that Adomnán sparked Bede's interest in the Easter dating controversy. In about 692, in Bede's nineteenth year, Bede was ordained a deacon by his diocesan bishop, John, who was bishop of Hexham. The canonical age for the ordination of a deacon was 25; Bede's early ordination may mean that his abilities were considered exceptional, but it is also possible that the minimum age requirement was often disregarded. There might have been minor orders ranking below a deacon; but there is no record of whether Bede held any of these offices. In Bede's thirtieth year (about 702), he became a priest, with the ordination again performed by Bishop John.