The abbot of Iona in the late 7th century, Adomnan, a kinsment of the founder St Columba, was one of the most remarkable thinkers of his era. The author of the magnificent Life of Columba as well as a widely influential guide to the Holy Places of the Near East, he was also responsible for the celebrated Cain Adomnain - a ground breaking law tract on the protection of non-combatants. Adomnan was also a major figure in the Easter Controversy and his scholarship directly influenced that of Bede. The studies in this volume, arising from a conference held on Iona on the 13th centenary of Adomnan's death, celebrate his achievements.