Stained glass window in Iona Abbey showing Saint Columba

Saint Columba (Irish Colm Cille, "Columb of the Church"; 7 December, 521–9 June, 597) was an Irish priest and missionary. He left Ireland in 563 AD on his mission to bring Christianity to Dál Riata, now western Scotland. He built the famous monastery on the Island of Iona which became known as a "holy island'.