Iona's place in history was secured when in 563 AD St. Columba arrived on its white sandy beaches with 12 followers, built his first Celtic church and established a monastic community.

Once settled, the Irish monk set about converting most of pagan Scotland and northern England to the Christian faith. Iona's fame as a missionary centre and outstanding place of learning eventually spread throughout Europe turning it into a place pilgrimage for several centuries to come. Iona became a sacred isle where kings of Scotland (48), Ireland (4) and Norway (8) were buried.

So who was St. Columba or Colum Cille in Gaelic…born of royal blood in 521 AD in Ireland or Scotia as it was then called, he was the grandson of the Irish King Niall. He left Ireland for Scotland not as missionary but as an act of self-imposed penance for a bloody mess he had caused at home. He had upset the king of Ireland by refusing to hand over a copy of the Gospels he had illegally copied, this led to a pitched battle in which Columba's warrior family prevailed. Full of remorse for his actions and the deaths he had ultimately caused he fled, finally setting on Iona as the first place he found from where he couldn't see his native Ireland. One of the features on the island is even called "The Hill with its back to Ireland".

St. Columba however, was not the shy retiring type and set about building Iona's original abbey from clay and wood. In this endeavour he displayed some strange idiosyncrasies, including banishing women and cows from the island, claiming that "where there is a cow there is a woman, and where there is a woman there is mischief". The abbey builders had to leave their wives, daughters, etc., on the nearby Eilean nam Ban (Woman's Island). Stranger still, he also banished frogs and snakes from Iona, how he accomplished this feat is not as well documented.

Strangest claim of all however is that Columba was prevented from completing the building of the original chapel until a living person had been buried in the foundations. His friend Oran volunteered for the job and was duly buried. It is said that Columba later requested for the Oran's face to be uncovered so he could bid a final farewell to his friend. Oran's face was uncovered and he was found to be still alive but uttering such blasphemous descriptions of Heaven and Hell that Columbus ordered that he be covered up immediately!

Over the centuries the monks of Iona produced countless elaborate carvings, manuscripts and Celtic crosses. Perhaps their greatest work was the exquisite Book of Kells, which dates from 800 AD, currently on display in Trinity College, Dublin. Shortly after this in 806 came the first of the Viking raids when many of the monks were slaughtered and their work destroyed.

Just outside the chapel is the Reilig Odhrain the sacred burial ground of the Scottish kings, said to include Macbeth's victim Duncan. The most recent grave is that of John Smith, leader of the British Labour Party from 1992, until his untimely death in 1994.

No part of St. Columba's original buildings have survived, however on the left hand side of the Abbey entrance can be seen a small roofed chamber which is claimed to mark the site of the saint's tomb