What Ireland’s Neolithic Tomb Maps Reveal About Its Ancient Past
By Anthony Murphy – Mythical Ireland
There is something extraordinary about standing beside an ancient tomb and then finding its place on a map of Ireland. The stones in front of you become part of a much larger story, stretching across valleys, hills and generations.
My recent visits to Proleek, Creevykeel, Ballymacdermot, Creggandevesky, Annaghmare and Ballykeel have brought several of these remarkable monuments into focus. But what happens when we step back from individual sites and look at the distribution of Irish Neolithic tombs across the whole island?
Patterns begin to emerge. Court tombs gather strongly in the north and west. Passage tombs draw our attention to great concentrations in Sligo and Meath. Portal tombs extend from northern landscapes into the south-east. The less familiar Linkardstown burials add another dimension to the picture – a notable south-eastern bias.
Together, these maps invite us to think about the communities who built the monuments, the traditions they shared and the different ways in which they remembered their dead.
Watch: Ireland’s Neolithic tomb traditions
In this short film, I bring the maps together to explore the regional patterns and overlaps between these burial traditions. Watch the reel below, then read on for a closer look at what the maps reveal.
Court tombs – a strong northern and western pattern
Court tombs take their name from an open court associated with a chambered burial gallery. Their recorded distribution is particularly striking in the northern half of Ireland, with substantial concentrations in the north-west and west. Seán Ó Nualláin’s overview of Irish megalithic tombs describes this broad pattern.
These are the monuments that have featured in my recent films from Creevykeel in County Sligo, Creggandevesky in County Tyrone, and Ballymacdermot and Annaghmare in County Armagh. Seen separately, each has its own character. Placed on the same map, they belong to a much wider architectural tradition.
The open court is an especially evocative feature. It invites us to consider how people approached the monument and whether gatherings or ceremonies took place outside its chambers. The architecture gives us something tangible to examine, even when the words spoken there and the beliefs behind them remain beyond our reach. Some of these monuments, like Creggandevesky and Annaghmare, have semicircular courts; others, like Creevykeel, have quasi-circular or completely enclosed courts with just a narrow stone passage entrance.
Recorded court tombs across Ireland, showing the strong northern and western concentration. Possible classifications are distinguished in the map legend.
Passage tombs – monumental landscapes
The passage tomb map brings several familiar landscapes into view: Carrowmore and Carrowkeel in County Sligo, Loughcrew in County Meath and the Boyne Valley complex of Newgrange, Knowth and Dowth.
The great monuments at Brú na Bóinne were built around 3200 BC. Their scale and megalithic art make them exceptional, but the wider map reminds us that they belong within a much larger tradition. There is lots of information and photographs here on Mythical Ireland providing an introduction to the complex.
At Carrowmore and Loughcrew, we encounter groups of tombs within a shared landscape. That matters when reading a distribution map: a dense cluster of points may represent numerous monuments within one cemetery.
For me, this is one of the most compelling aspects of the passage tomb tradition. It encourages us to look beyond an individual chamber and consider its relationship with surrounding hills and neighbouring monuments. A map helps us begin that exploration; being in the landscape gives it another dimension.
While there is a concentration of passage tombs in the northern half of the island, there are also clusters and individual examples in the south and east. Chronology raises questions too. The earliest dated passage tombs in Ireland are at Carrowmore, where the current reading of the radiocarbon evidence points to somewhere around 3750–3600 BC – putting that complex several centuries ahead of the Brú na Bóinne group at 3300–3000 BC. Earlier claims for a much older Carrowmore were heavily criticised, and what survives that criticism is still striking: the tradition appears to begin in the west. There are no carbon dates, not yet at least, for Loughcrew or places like Fourknocks. More firm dates might help explain some of the location spreads and patterns.
The recorded distribution of passage tombs, including major concentrations in Sligo and Meath and outlying monuments elsewhere on the island.
Portal tombs – the familiar silhouette of the dolmen
Portal tombs, often called dolmens, are among the most recognisable ancient monuments in Ireland. Tall entrance stones and a substantial capstone give many examples their distinctive appearance.
Their distribution has a strong northern presence, but also extends down the eastern side of the island into the south-east. This eastern extension is discussed in Ó Nualláin’s account of portal tombs.
Ballykeel, which I recently filmed, offers a memorable encounter with this tradition. On the map, it takes its place among a much broader spread of recorded monuments.
Comparing the portal-tomb and court-tomb maps is particularly revealing. There are areas of overlap, alongside differences in their wider geographical reach. Those similarities and differences give us questions to investigate about the spread of architectural ideas and the choices made by different communities.
Recorded portal tombs, or dolmens, across Ireland. The distribution includes a strong northern presence and a significant extension into the south-east.
Linkardstown burials – another part of the story
The Linkardstown map adds a smaller and less familiar group to our exploration. The recorded examples plotted here lie mainly in the southern and eastern parts of the island. Linkardstown-type burials are named after a site in County Carlow, and feature a round mound sealing a central cist containing human remains.
Baunogenasraid in County Carlow provides a useful example. Its Neolithic chamber contained the skeleton of an adult man, accompanied by pottery and a bone object. The mound was later enlarged and used for further burials in the Bronze Age. Heritage Ireland describes the excavation evidence.
Including these burials broadens our view beyond the most conspicuous standing monuments. It also helps us remember that a place could acquire new meanings and uses long after its first construction. There are not many examples of Linkardstown burials, and those that are known are concentrated significantly in the south-east. See map below.
The 12 located records plotted in this Linkardstown burial dataset, showing a mainly southern and eastern distribution. This is a count of the mapped records, not a claim that only 12 such burials ever existed.
What the maps can tell us
Bring these traditions together and two things become clear at once: strong regional patterns, and considerable overlap between them.
The overlap is the easier of the two to interpret. Court tombs and portal tombs share much of the same northern ground, and passage tombs appear in landscapes where both are already present. One reading is that these were communities in contact – sharing ideas about how to build, how to gather and how to commemorate their dead, while making different choices about the form those acts should take. A distribution map supports that much. It cannot tell us who those communities were, where their boundaries lay, or what they believed about the people they buried.
Time complicates the picture further. Every dot on these maps represents a monument built and used across many generations, and the traditions themselves span centuries. What we are looking at is not a snapshot of Neolithic Ireland but an accumulation – an image in which a tomb abandoned before its neighbour was begun sits alongside it as an equal point on the page.
Then there is the pattern that draws the eye immediately. Combine the four maps and the northern half of the island is dense with monuments, while parts of the midlands and the south-west appear close to empty.
Court tombs, passage tombs, portal tombs and Linkardstown burials shown together. The combined map highlights regional concentrations and overlap across traditions.
That contrast is real, and it is worth taking seriously. But before reading it as a map of where people lived, it is worth asking what could produce an empty space on a map like this one.
Some of it is a question of what I have plotted. These four traditions are Neolithic, and the south-west's most numerous megalithic monuments are not: wedge tombs, which belong to the later transition associated with the beginnings of metalworking, cluster in their hundreds across Cork, Kerry and Clare. Map those instead, and the south-west is one of the busiest parts of the island. The gap here is partly a gap in the categories, not in the past.
Some of it is a question of survival. Monuments endure where the land has been left alone. The uplands and rougher ground of Sligo, Tyrone and Armagh have preserved what two centuries of intensive tillage removed from the better soils of the midlands and the south – and the midlands carry the additional complication of raised bog, which both conceals sites and has shaped where archaeological survey has concentrated.
And some of it we simply do not know yet. Hundreds of unclassified mounds dot the Irish landscape, and excavation has a habit of turning them into passage tombs, or Linkardstown burials, or something nobody expected.
None of this dissolves the northern concentration. Court tombs genuinely are a northern tradition, and no amount of ploughing in Tipperary explains that away. But the honest version of the finding is narrower and more interesting than the one the combined map seems to offer at first glance: these four traditions were practised most intensively in the northern half of the island, and the blank areas elsewhere are a mixture of real absence, later monuments, lost monuments and monuments not yet recognised for what they are.
An area with few dots was never empty of people. It is only empty of this particular kind of evidence.
What genetics is adding
Genetics is beginning to answer a question the maps cannot. Ancient DNA recovered from passage tomb burials has revealed that individuals interred at Carrowmore and Carrowkeel in County Sligo were distantly related to a man buried at Newgrange, 150 kilometres to the east, and to a burial at Millin Bay on the north-east coast. Shared kinship across such distances suggests that the people using these monuments were not simply neighbouring communities who happened to build in similar ways, but part of a connected network – which is exactly the kind of relationship a distribution map can hint at and never demonstrate. The same study found something stranger still: the man from the most elaborate recess at Newgrange was the son of a first-degree incestuous union, a pattern known elsewhere only among ruling dynasties who married within the family to keep status inside it.
That finding was reported as evidence of a Neolithic "dynastic elite", and it may yet prove to be. But it has since been challenged on two grounds by Carlin, Smyth and colleagues – whether a handful of sampled individuals can stand for how an entire tradition used its tombs, and whether the Newgrange bone fragment's context within the chamber is secure enough to bear the weight placed on it. The kinship links between the great cemeteries are not in dispute. What those links meant socially very much is. It is a useful reminder that new evidence tends to sharpen our questions before it settles them.
What still isn't known
Why did particular architectural traditions flourish in some regions? How did neighbouring communities influence one another? What might future discoveries add to the pattern?
Standing beside a tomb, we encounter a particular place and its surviving stones. Looking at the map, we begin to appreciate the extraordinary extent and variety of the human endeavour behind them.
That is what keeps drawing me back to these monuments. Each visit offers another way of looking at Ireland’s ancient past, and another reminder of how much remains to be understood.
Which of these tombs have you visited, and which would you most like to explore? Let me know in the comments, and follow Mythical Ireland for more films, photographs and stories from Ireland’s ancient landscapes.
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About the maps
The map credits identify National Monuments Service Sites and Monuments Record open data and the Northern Ireland Sites and Monuments Record, with the combined dataset dated 10 September 2026. The combined map contains 869 located inventory records: 421 court tombs, 233 passage tombs, 203 portal tombs and 12 Linkardstown burials. These are dataset counts rather than definitive totals of surviving or originally constructed tombs. Some possible Northern Ireland classifications are included and distinguished in the legends; explicitly unlocated records are omitted. Major cemeteries can contain numerous records.
This selection covers the four traditions featured in the reel. Wedge tombs are outside its scope; it is not a complete map of all Irish prehistoric burial monuments. Wedge tombs belong to the later prehistoric transition associated with the beginnings of metalworking, as outlined by the National Museum of Ireland.
Further reading
Gabriel Cooney, Landscapes of Neolithic Ireland (Routledge, 1999) – the standard synthesis: it reads monuments as part of settled landscapes rather than as isolated objects. Cooney's chapter "The dead are everywhere" is the best single argument for why a distribution map of tombs is not a map of population.
Carleton Jones, Temples of Stone: Exploring the Megalithic Tombs of Ireland (Collins Press, 2007) – the accessible one. Site-by-site, well illustrated, written for general readers without talking down to them.
Michael Herity, Irish Passage Graves (Irish University Press, 1974) – dated in its chronology, which now looks far too late, but still the foundational catalogue of the passage tomb tradition and worth its place here for the history of how the "Boyne Culture" idea took hold.
Seán Ó Nualláin, Survey of the Megalithic Tombs of Ireland – the inventory volumes underlying the classifications the maps plot.
Stefan Bergh and Robert Hensey on the Carrowmore chronology (Oxford Journal of Archaeology, 2013) – the re-examination of the radiocarbon evidence that put Carrowmore's early dating on a defensible footing.
Lara Cassidy et al., "A dynastic elite in monumental Neolithic society" (Nature, 2020) – the Newgrange genomes. This is the work that reframed the question of who was buried in these monuments.
Robert Hensey, First Light: The Origins of Newgrange (Oxbow, 2015) – traces the passage tomb tradition's development over its full span rather than treating Brú na Bóinne as its starting point.
