Barclodiad y Gawres: Art, Fire and the Architecture of Sacred Passage
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Welcome to Stone Temple Gardening, where ancient monuments are explored not simply as archaeological sites standing in isolation from their surroundings, but as places shaped through landscape, movement, material and human encounter.
Often overshadowed by its cultrally connected big sister in Ireland, Newgrange, Barclodiad y Gawres is Wales’s great decorated passage tomb.
Barclodiad y Gawres sits on the western coast of Anglesey and is one of Britain’s most extraordinary decorated Neolithic monuments. Built around 5,000 years ago on a headland above Porth Tre-Castell, it belongs to the wider family of Irish Sea passage tombs and contains some of the finest surviving passage-tomb art in Britain.
Anglesey is a fascinating place absolutly stuffed with monuments. I have written about the Island in depth here, here, here, here and here. There are more!
In Part One, I explored the archaeology of the monument: its chambered structure, central hearth, unusual deposits and the small quantity of cremated human remains found within its side-spaces.
Here, the focus turns to the carved art that distinguishes this remarkable site.
But the archaeology leaves us with a problem.
Barclodiad y Gawres is described in the archaeological literature as a tomb.
Yet the dead were not placed at its centre.
Fire was.
What if Barclodiad was not primarily a house for the dead?
What if the human remains were part of something larger: a sacred architecture designed to lead the living through darkness, image and fire towards restricted encounter with the numinous powers of the sea?
Archaeology classifies Barclodiad as a passage tomb. The label is useful.
But classification is not explanation.
To understand Barclodiad, we have to begin somewhere more fundamental. Sacred architecture does not simply contain ritual; it shapes it, guiding movement, directing attention and altering what the body can see, hear and feel.
This asks us to examine how the monument’s architecture guides, orientates and affects the body and its senses.
Putting the Body Back into Barclodiad
Barclodiad y Gawres stands on a headland above Porth Tre-Castell, a sheltered landing place and pretty beach that still draws people to the western coast of Anglesey. As the only known megalithic chambered monument placed directly on the island’s coastline, its setting matters.
I began my visit at the small tourist car park beside the beach, surrounded by children and adults preparing for a day of sun, sand, ice cream and sea.
I began preparing for a different kind of journey.
My previous post to this one, The Landscape is the Stage, outlined in detail my philosophy of close attention to landscape, movement, body and perception. I brought that method to the front of my mind and set off towards Barclodiad y Gawres.
My approach from the beach began in open air, crossing a headland exposed to light, wind and weather. The Irish Sea lay beyond. The salty horizon was broad, while my own movement was channelled along a narrow dune path.
Ahead, the monument was initially hidden below a small rise that also obscured the full expanse of the sea.
The concealment created anticipation.
Then both were revealed in sequence.
First the seascape north, the coastline stretching away to Holyhead Mountain. Then the mound came into view, and then the full seascape, the coastline stretching away on either side. In clear summer sunshine, even the Wicklow Hills of Ireland can be seen on the distant, hazy horizon.
This is landscape dramaturgy in action.
The approach unfolds as a sequence of concealment, anticipation and revelation, created through the movement of the body across the terrain. The monument is not simply approached against a coastal backdrop. Its appearance is governed by the landscape itself, which conceals and then reveals monument and sea in sequence.
Then monument and setting take control, organising the body’s movement, orientation and senses.
The Journey Within
Imagine. The passage between outside and in was much lower and tighter than today.
To enter the mound, the body has to turn away from the open frontal Ireland prospect and into the north-facing passage. The imagined voyage towards the sea is checked at the threshold. For a moment, the body stands in balance: land to the left, sea to the right.
Then the inner voyage contracts.
The roof presses down, the uprights close in and the visible world narrows. The sea disappears. The sky disappears. The body is guided forward between stones.
Open approach becomes constrained movement; distance becomes closeness; light becomes darkness. The sounds of coast and gull give way to breath, footfall and voice enclosed by stone.
The passage is not simply a corridor leading to the sacred interior. It is a bridge from the profane to the sacred.
It is already part of the encounter.
Here, transition is foregrounded.
The Watcher at the Gate
Before the carved threshold is reached, the monument presents another carefully placed interruption.
On the left, set within a small recess, stood a now-removed pillar-like stone with an oyster shell at its base.
The form itself deserves attention. The stone was narrow, upright and tapering, its elongated profile suggestive of something organic, not an abstract, neutral block.
Set within a recess with an oyster shell at its base, it formed the first marked encounter inside the passage, immediately before the threshold to the inner monument.
When I visited, the niche remained but the stone did not. Yet I knew from my earlier research that an oyster shell had been found there, and that knowledge framed my encounter.
The body has left the sea behind.
Yet the sea is waiting inside.
One oyster shell should not be asked to carry an argument alone. Its importance lies in the sequence it begins to establish. Before the carved stones appear, a marine object and a distinctive upright form have already brought the oceanic environment into the symbolic journey.
Standing at the Threshold
Beyond this recess, the first great carved threshold stone comes into view.
Stone 22 stands near the chamber end of the passage, on the right, at the point where the constricted route begins to open into the central chamber.
The body encounters it at close range.
It presses into the space between entrance and arrival.
Its surface is densely worked with lozenges, zig-zags, chevrons and a weathered spiral. Human in scale and richly carved, Stone 22 strikes the eye immediately, but closer inspection continually reveals more.
But Stone 22 matters as form as well as carved surface.
While looking at the art, I did not at first notice the shape. Then a curious hole and cleft towards the top of the stone increasingly bothered me. Its edge reads strongly as an open mouth, while the hole falls where an eye might be seen.
The result is strikingly fish-like.
The carvings do not interfere with this reading. If anything, their zig-zags intensify it, gesturing towards waves, perhaps even scales.
Natural profile, carved surface and maritime context converge in a single threshold stone that is not simply there, but imaginatively present within the space.
This is a subjective perception, not a claim that every Neolithic person entering Barclodiad saw a fish. The more interesting question is whether the stone was selected and valued because its form already carried visual potential, a potential then intensified through transformative art.
At this point in the journey, the maritime clustering has begun to accumulate.
Sea beyond the headland.
An imagined route towards Ireland.
An oyster shell placed before the inner threshold.
An elongated pillar-like stone.
Now a fish-like carved threshold stone.
And Stone 22 does not stand alone.
The Attention Thickens
Across the chamber, my attention shifted towards Stones 5 and 6, standing to the left and extending the carved field.
Stone 5 carries lozenges and zig-zags related to those on Stone 22.
Stone 6’s surface carries a dense arrangement of angular motifs. Lozenges, zig-zags and horizontal bands cut across the upright, creating a patterned field of repeated line and enclosure. Unlike the spiral-dominated end-stones deeper in the monument, its imagery belongs to the sharper geometric language of the threshold.
Taller and angled slightly inward, Stone 6 catches the attention and helps turn the body towards the eastern chamber. It participates in the architecture of the threshold rather than simply standing beside it.
Before attention finally resolved on Stone 8, the eastern chamber offered another decorated surface. Stone 7, classified by Shee Twohig as C2, forms its northern wall. Its faint carving was first noticed in 2001 by Maggie and Keith Davidson, but remained largely unrecognised until March 2006, when George Nash and Adam Stanford recorded it formally as part of the Anglesey Rock Art Project. The design had been missed during the original 1950s excavation, probably because it is extremely faint and lies beyond natural light. Its recognition increased the number of known decorated stones at Barclodiad from five to six and confirmed that the eastern chamber contained a sequence of art rather than a single terminal image: Stone 6 turned attention inward, C2 extended the carved field along the chamber wall, and Stone 8 brought movement to a stop before its spirals.
Together, Stones 22, 5, 6 and C2 make the chamber entrance more than an opening.
They make it a marked transition.
The passage compressed movement.
The threshold releases it.
But the release is not directionless.
The position and angle of the carved stones appear to guide attention onwards and eastwards. Stone 22 addresses the decorated group across the threshold. Stones 5 and 6 gather the eye at the chamber mouth.
Attention turns the body.
Beyond them, deeper inside the eastern side-chamber, waits Stone 8.
The body follows.
The central chamber does not offer a single destination.
The art requires a turning.
The carved sequence draws movement towards the eastern chamber, where it comes to a stop before Stone 8.
Here the architecture resolves in a change of imagery.
Stone 8 is the end-stone of the eastern chamber, and here the motifs change from angle and cut to flow.
Four distinctive spirals run across the available surface in a carefully composed row. Some turn one way, some another, as if an ancestral tide were turning in stone, their movement surging across the tableau.
Its natural form also matters. The tapering outline and fractured surface created visual possibilities before carving began, including a lozenge-like form that echoes the geometric imagery of the threshold on Stone 22. Another angular opening sits at one end.
Like echoes across the chamber, natural forms, fractures and carvings seem to answer one another.
The body has now travelled from beach to headland, from concealment to revelation, from open horizon to narrowed passage, from oyster shell to carved threshold, and from threshold to a chamber that ends in form and swirling imagery.
Here I became conscious that I was standing between stone and fire.
The Sacred Heart
Behind me, at the heart of Barclodiad, lay the strange hearth and its ritual deposit explored in Part One: fire, ash and shell, together with an extraordinary gathering of creatures: wrasse, eel and whiting; frog, common toad and natterjack; grass snake; mouse, shrew and perhaps rabbit; possibly birds. Limpets and oysters clustered around the southern side of the hearth.
The imaginative weight of this almost Shakespearean brew is difficult to ignore.
The body has passed through the marked threshold and turned towards the eastern chamber, but all these movements return to the central space.
And at the centre stood not a grave.
A hearth alive with fire.
On my right stood the double-blocked western chamber.
Within it, unseen, lay a small enigmatic annexe and, at the back, the single spiral image on Stone 19.
Behind the double closure were small fragments of cremated human bone representing at least two individuals, probably male.
My mind tried to imagine who they were.
What did they represent?
How did they pass from life, through cremation, into fragmented deposit?
What kind of space was this?
If the chamber was closed from the beginning, the lone spiral of Stone 19 may have belonged to a restricted interior rather than repeated encounter by the living. The carved stone and human remains may have formed part of a deliberately withdrawn sacred space.
But another question arose.
If the chamber remained open for a time before being sealed, then its role may have changed.
Did the sequence move from encounter to withdrawal?
From access to closure?
We cannot know.
But the architectural distinction remains.
The eastern chamber received movement and ended in an accessible carved image.
The western chamber was withdrawn behind two acts of closure.
The remains within it were not simply present.
Access to them was controlled.
Completing the Circle
The body has one final move before completing the internal sequence.
It has been drawn towards the sea, turned away from it, narrowed into darkness, confronted with sea-material in the passage and at the threshold, directed towards image, returned to fire at the centre and brought before a chamber closed around fragments of the dead.
Beyond the fire lay one final destination: the southern chamber, marked by a low sill at its threshold.
Archaeology gives us little to work with here beyond small fragments of cremated bone clustering around the edges.
But standing inside, I realised that its orientation mattered.
Unlike the eastern and western chambers, it faces back towards the entrance and the carved threshold. From here, the body can turn and take in the monument as a whole: the passage beyond Stone 22, the carved stones gathered around the chamber mouth, the fire at the centre.
Whether this formed part of a formal ritual sequence cannot be known. But architecturally, it created a place from which the interior could be gathered into a single field of experience.
I stopped there for some time, trying to imagine what this space had once brought into being.
The guide who had gained us access to the locked interior was speaking to my tour companions. Other tourists took the opportunity to follow our group inside and the chamber quickly filled. Dogs barked. Young children cried in the dark as they stumbled over stone.
It became a cacophonous crush.
And suddenly the space taught me something else.
Barclodiad was not built for crowds.
Even a relatively small modern group filled the chamber with bodies and noise. Whatever happened here in the Neolithic, the architecture seems better suited to the presence of a few people than to a large gathering.
Sound, too, must have mattered: voices, breath, footfall, the crackle of fire, all enclosed within dark stone.
But above our heads sat the somewhat brutalist concrete dome of the 1960s reconstruction. Whatever acoustic world the original chamber once created can no longer be experienced directly beneath the new roof.
I lingered while the chamber emptied and, for a short time, had the space to myself.
I retraced the journey and tried to fix the feeling of being there in my mind before stepping back into bright sunshine and the distant vista of Holyhead Mountain.
My encounter over, I began to reflect on what the journey through Barclodiad had brought into being.
Tomb?
The experience had changed my mind.
More precisely, the method had changed my mind. Close attention to landscape, body, movement and perception had altered the questions I was asking of Barclodiad y Gawres.
This was the moment to step back and ask what kind of monument could produce such a sequence.
At Stone Temple Gardening, method changes the angle from which interpretation begins.
Not simply:
What type of monument is this?
But:
What is the monument bringing into being?
The progression from open sky to chamber and back again matters. The art was not encountered from outside by someone standing apart and looking in. It was reached by a body that had already been turned, narrowed and enclosed, leaving the familiar world behind and moving towards encounter with the numinous.
From Tomb to Temple
Barclodiad y Gawres is described in the archaeological literature as a passage tomb.
The term is useful as a formal classification. Archaeology makes the material world legible by separating, naming and ordering evidence so that monuments can be compared and understood.
But classification can also blunt what is particular.
To make monuments recognisable as a type, their differences are reduced to common criteria, and the distinctive character of place can become secondary to what sites share.
Within that system, Barclodiad clearly belongs to the formal category of passage tomb.
But using tomb starts a process.
Once human remains enter the frame, they can begin to determine what the monument is allowed to mean. Barclodiad becomes understood primarily as a place built for burial, while fire, carving, movement, darkness, deposition and differentiated access become ritual elaborations around that assumed primary function.
Human remains were present. That is certain.
But their presence does not, by itself, establish the purpose of the monument.
The surviving remains are not a substantial accumulation of complete individuals, but small and fragmentary deposits of cremated bone representing only a limited number of people.
The dead were present.
But they were not given the centre.
Fire was.
If burial was Barclodiad’s primary purpose, the dead are strangely slight in the surviving composition. If, however, selected human remains were incorporated into a wider sacred architecture, their fragmentary and restricted presence begins to make more sense. They may have acted as ancestral material, consecrating deposits, offerings or sacred substances.
We cannot recover the precise Neolithic category.
But neither should we treat burial as self-evident simply because human bone was present.
A funerary interpretation explains why human remains might be found within Barclodiad.
It does not explain the monument as a whole.
For that, we need to return to the architecture and the art.
The Architecture of the Rock Art
Barclodiad’s carvings were not distributed randomly.
As we have seen, three of the principal decorated stones, Stones 5, 6 and 22, gather around the point where the passage opens into the central chamber. Stones 8 and 19 stand at the ends of the eastern and western side-chambers.
The art therefore occupies places of change.
Where passage becomes chamber.
Where attention turns the body.
Where movement stops.
Before asking what a spiral, lozenge or zig-zag meant, we should ask why an image was placed there.
The carvings belonged to the journey.
The art was not made for distant or continuous display. It was encountered inside the mound, in darkness, at close range and under introduced light.
Seeing was an action.
Animated Presences
The process at Barclodiad meant the body had to enter, turn, approach before viewing the illuminated art.
Under these conditions a shallow groove could disappear and return as the light changed. A spiral could flatten into stone and then coil back into view. The image was not simply present in the manner of an illustration on a page. It was animated by fire.
The sacred experiential nature of this configuration is self-evident. To experience Barclodiad was to enter the realm of illuminated presences sanctified by the double sealed dead.
An Irish Sea Form Made Local
Barclodiad’s carved stones do not stand alone.
Its cruciform architecture and its spirals, lozenges, chevrons and zig-zags belong within the wider world of Neolithic passage-tomb building and art. The closest comparisons lie across the Irish Sea.
That matters.
The Irish Sea was not a wall dividing separate cultural worlds.
It was a field of movement.
People crossed it. Practices, ideas and visual traditions crossed with them.
Barclodiad should not therefore be understood as an Irish monument simply transplanted onto Anglesey. Its architecture and art belong to that wider maritime world, but the monument was made intensely local through its position above Porth Tre-Castell, its relationship with the coastal approach and the marine material carried into its interior.
It is an Irish Sea form made local.
And that connection changes the question.
If the sea was the route through which people, practices and images moved, what did it mean to construct such a monument directly above a sheltered landing place and then lead the body from open horizon into a chambered world of darkness, image and fire?
This brings us back to passage itself.
Barclodiad-y-Gawres Temple of the Sea
Taken together, the coastal setting, Irish Sea connections, marine material and architecture of controlled movement suggest that the sea itself belonged to Barclodiad’s sacred concerns.
This was a world in which people crossed open water, followed coasts, sought fishing grounds and travelled towards destinations now lost to us. The sea offered connection, food and opportunity, but it was also dangerous, unpredictable and beyond complete human control.
Across maritime cultures, such uncertainty has repeatedly drawn ritual precautions, offerings, taboos and petitions towards powers believed capable of influencing what human skill alone could not guarantee.
Imagine, then, what Barclodiad may have been for.
Here, perhaps, offerings were given, blessings sought and prayers spoken before crossings, fishing expeditions and journeys across the water. Safe departure, successful return, plentiful catches and protection from the dangers of the sea may all have belonged to the sacred concerns gathered here.
The dead may also have played a crucial role. The cremated fragments sealed within the western chamber need not represent the monument’s primary purpose. They may instead have been consecrated ancestral remains, incorporated into the sacred architecture as intermediaries between the living and powers beyond the human world.
We cannot know the names of those powers or recover the words spoken in the darkness. But the monument’s position above the sea, its connections across that water, the clustering of maritime material and imagery within its interior, and the controlled presence of the dead give such possibilities weight.
As a formal archaeological classification, passage tomb remains useful.
As an explanation of what the monument was for, it is less satisfactory.
I use temple here to describe architecture deliberately constructed to create sacred space and organise encounter.
Barclodiad did exactly that.
The fire was ceremony.
The carvings were encounter.
The dead may have been mediators.
The sea was livelihood, route, danger and possibility.
Barclodiad gathered them all together.
Where the sea bit deep, ritual began.
Alexander Peach
Uffcott Wiltshire
July 2026
Further Reading
Powell, T. G. E. and Daniel, G. E. (1956), Barclodiad y Gawres: The Excavation of a Megalithic Chamber Tomb in Anglesey, 1952–3. Liverpool University Press.
The foundational excavation report and essential starting point for the monument’s architecture, deposits, decorated stones and human remains.
Shee Twohig, E. (1981), The Megalithic Art of Western Europe. Oxford: Clarendon Press.
The major comparative study of western European megalithic art and still fundamental for placing Barclodiad within the wider Atlantic passage-tomb tradition.
Nash, G. H. (2006), The Architecture of Death: The Chambered Monuments of Wales. Logaston Press.
A broad study of Welsh chambered monuments, including their architecture, landscape and rock art. A revised and updated edition was published in 2024 as Neolithic Tombs of Wales.
Nash, G. H. (2006), ‘Light at the End of the Tunnel: The Way Megalithic Art Was Viewed and Experienced’, Documenta Praehistorica 33.
Especially relevant to this essay’s concern with darkness, restricted visibility, movement and the changing experience of carved surfaces under introduced light.
Cunliffe, B. (2001), Facing the Ocean: The Atlantic and Its Peoples, 8000 BC to AD 1500. Oxford University Press.
Useful for thinking beyond modern land-based boundaries and understanding the Atlantic seaways as routes of movement, communication and cultural connection.
Malinowski, B. (1922), Argonauts of the Western Pacific.
The classic anthropological study behind later discussions of the relationship between maritime danger, uncertainty, ritual and magical or protective practice. It does not provide an analogy for Neolithic Anglesey directly, but helps establish the wider human pattern invoked in the conclusion.
Poggie, J. J. Jr, Pollnac, R. B. and Gersuny, C. (1976), ‘Risk as a Basis for Taboos among Fishermen in Southern New England’, Journal for the Scientific Study of Religion 15.3, pp. 257–262.
Directly relevant to the relationship between maritime risk and ritual taboo. Later work has debated how far such practices can be reduced simply to anxiety, but the broader association between fishing, danger, taboo and ritual is well documented.
