Carrowmore: Ireland's Great Neolithic Megalithic Cemetery

Carrowmore, in County Sligo in north-west Ireland, is one of the largest and oldest megalithic cemeteries in the country. Its small stone tombs, set within circles of boulders, were built mainly around 3700–3500 BC by some of Ireland’s earliest farming communities. The cemetery lies beneath the mountain of Knocknarea and has been at the centre of a long debate about when and by whom Ireland’s first megaliths were built.

The landscape

Carrowmore stands on the Cúil Irra peninsula, about 4 kilometres (2.5 miles) south-west of Sligo town, between the bays of Sligo and Ballysadare. The peninsula is ringed by prominent hills. To the west rises Knocknarea, about 327 metres high, while the distinctive profile of Benbulben is visible across Sligo Bay to the north.

Archaeologists see Carrowmore as part of a wider Sligo landscape of passage tombs. The great cairn on Knocknarea and the hilltop cemetery of Carrowkeel, some 25 kilometres to the south, belong to the same tradition, which also includes the Boyne Valley tombs such as Newgrange.

The monuments

A typical Carrowmore monument is a small chamber of five or six upright stones topped by a capstone, often called a dolmen, surrounded by a ring of large boulders. Archaeologists usually class them as simple passage tombs. Many face towards the centre of the cemetery.

At that centre lies Listoghil, also known as Tomb 51, the largest monument. It has a substantial rectangular chamber with a large limestone capstone, covered by a cairn of stones. Faint carvings on the capstone are among the few examples of megalithic art at the site. The cairn visible today is partly a modern reconstruction made after excavation.

The antiquarian George Petrie surveyed the cemetery in 1837 and numbered the monuments, a system still used today. He recorded more than 60 sites. In the following century and a half, many were destroyed by gravel quarrying and land clearance, and around 30 survive.

Burials and finds

Most of the human remains found in the tombs were cremated. Burnt bone was placed in the chambers, sometimes with objects such as antler and bone pins and small balls of chalk or stone. Listoghil also contained unburnt bone, and some remains show signs of having been handled or moved after death.

Unlike the later Boyne tombs, the Carrowmore monuments contained little pottery. Seashells and the bones of wild animals found at some tombs suggest the people who used the cemetery made full use of the sea and shore as well as farming.

The dating debate

Between 1977 and 1982, a Swedish team led by Göran Burenhult excavated several tombs. Some of their radiocarbon dates were extremely early, falling in the fifth millennium BC or even before. Burenhult argued that the first tombs had been built by hunter-gatherers, before farming reached Ireland, which would have made Carrowmore among the oldest megalithic monuments in Europe.

Many archaeologists doubted these dates, pointing to problems with the samples and their context. In 2013 Stefan Bergh and Robert Hensey re-examined the evidence and concluded that the main construction and use of the cemetery belonged to the early Neolithic, around 3700–3500 BC. This places Carrowmore among the earliest megalithic sites in Ireland, but within the period of farming rather than before it.

Carrowmore and Knocknarea

Knocknarea dominates the view to the west of the cemetery. On its summit sits Miosgán Meadhbha, often called Queen Maeve’s Cairn, a huge mound of stones about 55 metres across and around 10 metres high. It has never been excavated but is thought to cover a passage tomb. Medieval legend linked it to Medb, the warrior queen of Connacht in Irish myth.

Many researchers believe Carrowmore was laid out with Knocknarea in mind, and that the cemetery, the mountain-top cairns and the surrounding hills formed one ritual landscape. Similar arrangements of passage tombs on prominent hills appear elsewhere in Ireland and in Atlantic Europe, from Brittany’s Gavrinis passage grave to the Cairn of Barnenez.

Conservation and visiting

Much of Carrowmore was in private farmland for centuries, and its monuments suffered from stone robbing as well as quarrying. The central part of the cemetery was later taken into state care and is now managed by the Office of Public Works, which runs a seasonal visitor centre. Paths lead visitors between the tombs scattered across the surrounding fields.

The reconstruction of the Listoghil cairn after excavation has been debated, since some archaeologists question how closely it reflects the original form. Even so, the site remains one of the best places in Ireland to see a whole early Neolithic cemetery set in its wider landscape of hills and sea.

Timeline

• c. 3700–3500 BC: Main period of tomb building and burial at Carrowmore, according to current dating.
• c. 3500 BC onward: Larger passage tombs develop in the Sligo region and later in the Boyne Valley.
• 1837: George Petrie surveys and numbers the monuments.
• 1977–1982: Swedish excavations led by Göran Burenhult.
• 2013: Bergh and Hensey publish a revised chronology for the cemetery.

Why it matters

Carrowmore shows how early farming communities in Ireland marked their landscape with monuments to the dead within a few centuries of farming’s arrival. The debate over its dates also illustrates how archaeologists test and revise striking claims as evidence and methods improve.