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Dál Riata[edit]
The Book of Kells – Gospel of John
In the early Historic Period Iona lay within the Gaelic kingdom of Dál Riata, in the region controlled by the Cenél Loairn (i.e. Lorn, as it was then). The island was the site of a highly important monastery (see Iona Abbey) during the Early Middle Ages. The monastery was founded in 563 by the monk Columba, also known as Colm Cille, who sailed here from Ireland to live the monastic life. Much later legends (a thousand years later, and without any good evidence) said that he had been exiled from his native Ireland as a result of his involvement in the Battle of Cul Dreimhne. Columba and twelve companions went into exile on Iona and founded a monastery there. The monastery was hugely successful and may have played a role in the conversion to Christianity of the Picts and Gaels of present-day Scotland in the late 6th century, and was certainly central to the conversion of the Anglo-Saxon kingdom of Northumbria in 635. Many satellite institutions were founded, and Iona became the centre of one of the most important monastic systems in Great Britain and Ireland.
Iona became a renowned centre of learning, and its scriptorium produced highly important documents, probably including the original texts of the Iona Chronicle, thought to be the source for the early Irish annals. The monastery is often associated with the distinctive practices and traditions known as Celtic Christianity. In particular, Iona was a major supporter of the "Celtic" system for calculating the date of Easter at the time of the Easter controversy, which pitted supporters of the Celtic system against those favoring the "Roman" system used elsewhere in Western Christianity. The controversy weakened Iona's ties to Northumbria, which adopted the Roman system at the Synod of Whitby in 664, and to Pictland, which followed suit in the early 8th century. Iona itself did not adopt the Roman system until 715, according to the Anglo-Saxon historian Bede. Iona's prominence was further diminished over the next centuries as a result of Viking raids and the rise of other powerful monasteries in the system, such as the Abbey of Kells.
The Book of Kells may have been produced or begun on Iona towards the end of the 8th century. Around this time the island's exemplary high crosses were sculpted; these may be the first such crosses to contain the ring around the intersection that became characteristic of the "Celtic cross". The series of Viking raids on Iona began in 794 and, after its treasures had been plundered many times, Columba's relics were removed and divided two ways between Scotland and Ireland in 849 as the monastery was abandoned.
Kingdom of the Isles[edit]
As the Norse domination of the west coast of Scotland advanced, Iona became part of the Kingdom of the Isles. The Norse Rex plurimarum insularum Amlaíb Cuarán died in 980 or 981 whilst in "religious retirement" on Iona. Nonetheless, the island was sacked twice by his successors, on Christmas night 986 and again in 987. Although Iona was never again important to Ireland, it rose to prominence once more in Scotland following the establishment of the Kingdom of Scotland in the later 9th century; the ruling dynasty of Scotland traced its origin to Iona, and the island thus became an important spiritual centre for the new kingdom, with many of its early kings buried there. However, a campaign by Magnus Barelegs led to the formal acknowledgement of Norwegian control of Argyll, in 1098.
Somerled, the brother-in-law of Norway's governor of the region (the King of the Isles), launched a revolt and made the kingdom independent. A convent for Augustinian nuns was established in about 1208, with Bethóc, Somerled's daughter, as first prioress. The present buildings are of the Benedictine abbey, Iona Abbey, from about 1203, dissolved at the Reformation.
On Somerled's death, nominal Norwegian overlordship of the Kingdom was re-established, but de facto control was split between Somerled's sons, and his brother-in-law.
Kingdom of Scotland[edit]
Following the 1266 Treaty of Perth the Hebrides were transferred from Norwegian to Scottish overlordship. At the end of the century, King John Balliol was challenged for the throne by Robert the Bruce. By this point, Somerled's descendants had split into three groups, the MacRory, MacDougalls, and MacDonalds. The MacDougalls backed Balliol, so when he was defeated by Bruce, the latter exiled the MacDougalls and transferred their island territories to the MacDonalds; by marrying the heir of the MacRorys, the heir of the MacDonalds re-unified most of Somerled's realm, creating the Lordship of the Isles, under nominal Scottish authority. Iona, which had been a MacDougall territory (together with the rest of Lorn), was given to the Campbells, where it remained for half a century.
In 1354, though in exile and without control of his ancestral lands, John, the MacDougall heir, quitclaimed any rights he had over Mull and Iona to the Lord of the Isles (though this had no meaningful effect at the time). When Robert's son, David II, became king, he spent some time in English captivity; following his release, in 1357, he restored MacDougall authority over Lorn. The 1354 quitclaim, which seems to have been an attempt to ensure peace in just such an eventuality, took automatic effect, splitting Mull and Iona from Lorn, and making it subject to the Lordship of the Isles. Iona remained part of the Lordship of the Isles for the next century and a half.
Following the 1491 Raid on Ross, the Lordship of the Isles was dismantled, and Scotland gained full control of Iona for the second time. The monastery and nunnery continued to be active until the Reformation, when buildings were demolished and all but three of the 360 carved crosses destroyed. The Augustine nunnery now only survives as a number of 13th century ruins, including a church and cloister. By the 1760s little more of the nunnery remained standing than at present, though it is the most complete remnant of a medieval nunnery in Scotland.
Post-Union[edit]
After a visit in 1773, the English writer Samuel Johnson remarked:
The island, which was once the metropolis of learning and piety, now has no school for education, nor temple for worship.
He estimated the population of the village at 70 families or perhaps 350 inhabitants.
In the 19th century, green-streaked marble was commercially mined in the south-east of Iona; the quarry and machinery survive, see "Marble Quarry remains" below.
