|Catholic Encyclopedia: St. Columba - Also known as Columcille. Long article on the Irish-born monk, founder and abbot of Iona. He died in 597.
||Catholic Online: St. Columba - Brief biography.
|Columba, Abbot of Iona and Missionary - Brief biography. With prayer in traditional and contemporary language.
||Columba of Iona - Short biography, by Karen Rae Keck.
|Columbia Encyclopedia: Columba, Saint - Brief biographical entry.
||Encyclopędia Britannica: Columba, Saint - Biography of the sixth-century Irish monk and missionary. In the 11th edition (1911).
|For All the Saints: Columba - Also called Columbus, Combs, or Columkill. Long hagiographical essay.
||Life of St. Columba - A translation from the Latin. Written by Adamnan. 242K.
|Manx Notebook: St. Columba - Brief illustrated biography.
||Patron Saints Index: Columba - Also known as Colmcille. Illustrated profile.
|Saint Columba, Abbot, Confessor - From the book "Lives of Saints," published by John J. Crawley.
||St. Columba, or Columcille, 521-597 - Short biography.
|St. Columba, or Columkille - Hagiography. From Alban Butler's Lives of the Saints.