For centuries, Lismore was known from chronicles and tradition as the home of an important early Christian monastery. Archaeologically, however, the monastery founded by Saint Mo Luóc in western Scotland during the sixth century remained remarkably elusive.
Now, years of community-led excavations are changing that picture. Archaeologists have uncovered an early medieval cemetery, buildings and an exceptional craftworking complex where artisans cast copper alloys and worked precious metals. More than 1,000 fragments of non-ferrous metalworking debris have emerged from one excavation area alone, including crucibles, lids and moulds. Some crucibles contain unusually high levels of gold and silver, providing rare evidence that precious metals were being cast at Lismore.
Published in Antiquity, the research suggests that Lismore was far more than a small island monastery. Between the seventh and tenth centuries, it appears to have developed into a wealthy and artistically sophisticated ecclesiastical centre with connections extending beyond its immediate region. Some of the craftsmanship discovered there has no known parallel elsewhere in Scotland.
Searching for a monastery known mostly from history
Lismore lies at the mouth of Loch Linnhe in Argyll, on Scotland’s western seaboard. Historical sources associate the island with Mo Luóc, whose death appears in Irish chronicles in the late sixth century. Later traditions credited the saint with founding numerous monasteries, while the deaths of subsequent abbots also appear in early records.
The monastery belonged to the world of Dál Riata, a Gaelic-speaking kingdom encompassing Argyll, much of the Hebrides and territory across the Irish Sea in present-day Northern Ireland. During the sixth to early eighth centuries, this maritime landscape became an important centre of Christian, cultural and political activity. Iona eventually became its most famous monastery, but historical evidence also points to important religious centres at Lismore, Applecross and St Blane’s on Bute.
Yet physical evidence for Mo Luóc’s monastery remained surprisingly scarce. Archaeologists had long suspected that it lay beneath or around the later cathedral at Clachan. Early medieval cross fragments and several seventh- or eighth-century dress pins offered clues, but excavations in the mid-2000s failed to expose the missing religious centre.
That began to change after the Lismore Historical Society launched a new search in 2016. Geophysical surveys and targeted excavation gradually revealed a much deeper early medieval landscape around the present parish church.
Gold, silver and more than 1,000 traces of metalworking
One of the most revealing discoveries came from an area containing an oval stone structure roughly eight metres across. Inside, archaeologists found pottery, cut antler, a crucible fragment and a possible metal punch. Immediately outside, charcoal-rich deposits yielded hundreds of clay mould fragments, crucibles, carved wood and other traces of specialised production.
In total, the team recovered more than 1,000 fragments associated with non-ferrous metalworking. Moulds show that craftspeople cast at least two types of penannular brooch, along with rectangular objects that may have been buckles. X-ray fluorescence analysis identified copper alloys as the main metals, while several crucibles contained elevated levels of silver and gold—rare evidence for precious-metal casting. The discovery also gives new context to an early medieval touchstone for testing gold found on Lismore in the nineteenth century.
Radiocarbon dating places the craftworking deposits mainly between the seventh and ninth centuries. The assemblage of non-ferrous moulds and crucibles ranks as the largest yet discovered in Scotland after Dunadd, one of Dál Riata’s major power centres.
The quality of the craftsmanship makes Lismore even more remarkable. Finely carved bone “motif pieces” carry intricate interlace designs that may have helped metalworkers develop patterns or shape gold foil for decorative objects. Researchers know of no comparable examples of this quality elsewhere in Scotland and only a handful in Ireland.
Waterlogged conditions also preserved bone, antler, horn and wood. Archaeologists identified yew hoops from stave-built vessels, part of a possible yew box and manufacturing offcuts, alongside a large whetstone suitable for sharpening substantial blades such as swords or sickles.
A cemetery reveals another side of Lismore
The monastery was also a place where generations were buried.
Excavations confirmed an early medieval cemetery enclosed by a limestone wall. Radiocarbon dating places the earliest tested burial between AD 650 and 780, while another dates between AD 900 and 1040. Further graves clustered around a broken granite cross known as the Sanctuary Stone. Adults, adolescents, children, and infants were all represented, although the initial assessment found that all of the adult skeletons examined in this area were male.
Some graves tell more complicated stories. Archaeologists found pairs of infants apparently placed together in single grave cuts. Elsewhere, a disarticulated femur carried sharp-force trauma that may have been inflicted by a sword or axe. Repeated burial activity had disturbed older remains, leaving bundles and spreads of human bone among later graves.
Three newly recovered fragments of decorated early medieval cross-slabs add another dimension. Some contain forms of ornament not previously identified in early medieval Scotland. Other highly accomplished patterns resemble sculpture from Applecross, Nigg and Rosemarkie, raising the possibility that craftspeople connected to the same wider artistic tradition worked at Lismore.
A forgotten power centre of early medieval Britain
Taken together, the cemetery, buildings, precious-metal working, sculpture and specialised crafts transform the archaeological picture of Lismore. The researchers argue that the evidence points to a thriving monastic community with regional and possibly supra-regional influence during the seventh to tenth centuries.
Its location may help explain that importance. Lismore sits at the entrance to Loch Linnhe and the Great Glen, a strategic corridor through the Scottish Highlands. It also occupied unusually productive agricultural land and stood close to Dunollie, an important fortified centre repeatedly mentioned in Irish chronicles.
The findings also invite a reassessment of a landscape long viewed through the fame of Iona. The authors suggest that Iona’s later prominence may have overshadowed other powerful Christian establishments in Dál Riata. Some of those centres may even have competed for ecclesiastical prominence, although the surviving written sources provide only a fragmentary view of those relationships.
Lismore’s earliest sixth-century church has still not been located, and archaeologists have yet to establish the full boundaries of the monastic enclosure. But beneath and around the later religious landscape, the material traces are becoming difficult to miss. Gold and silver were cast here, highly skilled artisans produced objects and designs with few or no Scottish parallels, and generations were buried within a community whose importance had largely slipped from archaeological view.
The monastery was never entirely lost to history. What archaeology is recovering is something more significant: the scale of the world that once existed around it.
Ellis, C., Boyle, A., Cruickshanks, G., Evans, N., Hay, R., Masson-MacLean, E., … Noble, G. (2026). A major monastic centre? Rethinking Lismore’s place in the ecclesiastical landscapes of early medieval Britain. Antiquity, 100(413), 1330–1349. doi:10.15184/aqy.2026.10379
