The Breast on Stone 16: An Update

Tim Daw  |  www.sarsen.org  |  2026

 

The Original Observation (2015)

In March 2015I noted a feature on Stone 16 of the outer sarsen circle at Stonehenge that I could not explain. The north-eastern face of the stone — the side visible from inside the monument, on the line of the midwinter sunset alignment — has been finely pecked to a smooth, straight surface. The dressing is meticulous. Yet at just below head height, a rounded protrusion was deliberately retained. Its outermost part appears to have been broken off at some point, but there is no question that it was left in place while the rest of the face was worked flat around it.

I cautiously suggested that the protrusion resembled a breast, while acknowledging the risk of pareidolia. An update to the original post drew attention to the Kerloas menhir at Plouarzel in Brittany, where two projecting bosses were deliberately left on an otherwise smoothed 9.5-metre standing stone, and were later associated with fertility rites.

In the decade since, new evidence has come to light — particularly from Cornwall — that strengthens the case for reading Stone 16’s protrusion as an intentional breast motif, and allows a more developed speculation about the stone’s role within the monument.

Comparanda: Breast Motifs on Atlantic Megaliths

Boscawen-ûn, Cornwall. The most significant British parallel emerged in the same year as my original post. In July 2015, the archaeologist and 3D specialist Tom Goskar recorded the central leaning stone at Boscawen-ûn stone circle near St Buryan using photogrammetry. His digital surface analysis revealed that the features on the north-east (inner leaning) face, previously interpreted as a pair of axe-head carvings, are more probably a pair of feet carved in low relief, soles outwards, with a row of toes discernible on the right foot. More striking still, roughly 500mm above the feet, Goskar identified a pair of circular features, also in low relief, which he noted “appear very similar to carvings interpreted as breasts on some allées couvertes in Brittany (Tressé, Prajou-Menhir, etc.)” (Goskar 2015).

Goskar’s interpretation is that the Boscawen-ûn central stone may have been reused from a dismantled chambered tomb that incorporated decorated stones in the Breton style — a practice well attested in Brittany itself (Scarre 2011, p.147). He has since identified a second set of possible breast motifs at Carn Leskys near St Just, describing the Boscawen-ûn pair as “the first set of breast motifs that I have found in Cornwall” (Goskar 2024). These are, as far as I am aware, the only identified examples of the Breton-style breast motif in mainland Britain.

The Kerloas menhir, Plouarzel, Finistère. This remains the closest technical parallel to Stone 16. The Kerloas menhir, the tallest standing menhir in Europe at 9.5 metres, was deliberately smoothed but retains two hemispherical protuberances about one metre from the ground, on opposite faces (east and west). The 18th-century antiquary Jacques Cambry described them as “espèces de mamelles” (a kind of breast), while Charles Blin also considered them feminine in character. According to tradition, newly-wed couples would come naked to the stone and rub their bellies against the bosses to ensure fertility. The parallel with Stone 16 lies not in carved relief but in the retention of a protrusion on an otherwise dressed surface — the same deliberate act of leaving a boss intact while working the surrounding stone flat.

The Guernsey statue-menhirs. Two anthropomorphic menhirs on Guernsey — the Castel Church statue-menhir and La Gran’mère du Chimquière at St Martin’s — are relevant as intermediate examples between Brittany and Britain. The Castel statue-menhir, a granite slab approximately 1.65 metres high found under the church chancel in 1878, bears carved breasts and a necklace. These features are shared with statue-menhirs in northern France, Corsica, and the wider western Mediterranean. The La Gran’mère, originally a Neolithic or early Bronze Age standing stone, was later re-carved with a head and shoulders, probably in the Celtic or Roman period. Both demonstrate that the breast motif was current in the Channel Islands — the cultural midpoint between Brittany and southern Britain.

Breton allées couvertes. The breast-on-stone motif is most densely concentrated in the gallery graves of Brittany and the Paris Basin. The allée couverte at Tressé (La Maison des Feins) preserves multiple breast-pairs with collars carved in high relief on sidestones. Similar paired bosses appear at Prajou-Menhir and Kergüntuil. In the gallery graves of the Seine-Oise-Marne culture, breast imagery appears alongside axes and necklaces on tomb orthostats, notably in the Petit Morin valley. The consistent association is with funerary contexts: the breasts appear at the threshold or within the chamber, at the boundary between the living and the dead.

Across all of these examples, one pattern is emphatic: breasts on megaliths almost invariably appear in pairs. Bilateral symmetry is the norm. This has direct implications for Stone 16.

Stone 16 and the Missing Stone 15: A Paired-Breast Hypothesis

Stone 16 sits on the south-western arc of the sarsen circle, on the primary solstitial axis — the line connecting the midsummer sunrise to the north-east with the midwinter sunset to the south-west. The breast-like protrusion is on its north-eastern face: the side facing the interior of the monument, and the direction from which the last light of the midwinter sun would have entered the circle before setting between the uprights of the Great Trilithon.

Stone 15, its immediate neighbour to the south, is missing. Its stonehole survives, and its former position is marked on all modern plans, but no fragment of the stone has been identified. We cannot know how its faces were dressed or whether it carried any features. What we can say is that Stones 15 and 16, standing side by side on the south-western arc, would have flanked the view from inside the circle toward the midwinter sunset.

Given that the Atlantic Neolithic breast motif overwhelmingly appears in bilateral pairs, it is reasonable to ask whether Stone 15 once carried a matching protrusion on its own north-eastern face. If so, the two stones together would have presented a pair of breasts to anyone standing inside the circle and looking toward the solstitial sunset — a pair of retained bosses on otherwise finely dressed surfaces, flanking the solar corridor.

Interpretation: Fertility at the Solstitial Threshold

The placement of such a motif on the solstitial alignment would not be anomalous. It would, in fact, be entirely consistent with the broader Neolithic use of breast imagery.

In the Breton allées couvertes, breasts appear at the threshold of the burial chamber — the boundary between the world of the living and the world of the dead. In passage graves, the corridor itself functions as a symbolic birth canal, and the chamber as a womb; breast imagery near the entrance reinforces the association with nurture and regeneration. At the Kerloas menhir, the breast-bosses are associated with fertility rites in which the stone mediates between human aspiration and cosmic process.

At Stonehenge, the midwinter sunset marks the nadir of the solar year: the shortest day, the moment when the sun “dies.” English Heritage’s own analysis emphasises that midwinter, rather than midsummer, was probably the more important focus for the builders, given the monument’s orientation and the evidence for large-scale midwinter feasting at Durrington Walls. The midwinter sunset, sinking between the uprights of the Great Trilithon and falling onto the Altar Stone, was the central dramatic event of the monument.

To place a breast — or a pair of breasts — at the inner threshold of the circle, on the solstitial line, would have been to frame that moment of solar death with a symbol of nurture and renewal. This is precisely the logic we see at Newgrange, where the midwinter sunrise penetrates a womb-like chamber, and at the Breton passage graves, where breast imagery guards the passage between death and regeneration. The builders of Stonehenge were participants in the same Atlantic cultural world that produced the breast carvings at Tressé, Prajou-Menhir, and now Boscawen-ûn. It would be more surprising if that symbolic vocabulary were entirely absent from the monument.

Caveats

Several important caveats must be stated. First, Stone 16’s protrusion has not been subjected to the kind of photogrammetric or RTI analysis that Goskar applied at Boscawen-ûn. A 3D surface survey would help to establish whether the feature was shaped or merely retained, and how it compares dimensionally and morphologically with the Kerloas bosses and the Boscawen-ûn reliefs.

Second, Stone 15 is entirely missing. The paired-breast hypothesis therefore rests on analogy with the wider tradition rather than on direct evidence from the missing stone. It is an inference, not a demonstrated fact.

Third, the Boscawen-ûn breast identifications, while produced by rigorous digital methods, remain tentative. Goskar himself frames them as features that “appear very similar to” Breton examples, not as certain identifications. The coarse Lands End granite makes fine detail difficult to resolve.

Fourth, Stone 16’s protrusion is a single feature on a single face, not a carved pair. If the paired-breast reading is to hold, it requires the cooperation of a stone that no longer exists. This is speculative archaeology in the fullest sense.

Conclusion

The protrusion on Stone 16 is not a natural accident left by careless workmanship. The stone’s north-eastern face was dressed to a standard of finish that demonstrates complete control of the material. The boss was retained by choice. Its position — on the solstitial alignment face, at roughly head height, on the inner side of the circle — is consistent with the placement of breast motifs in the broader Atlantic Neolithic tradition: at thresholds, on alignment faces, in contexts associated with death and regeneration.

With the identification of probable breast carvings at Boscawen-ûn in 2015 and at Carn Leskys in 2024, the breast motif is no longer confined to Brittany and the Channel Islands. It is present in Cornwall, within the same broadly Atlantic cultural zone that Stonehenge’s builders inhabited. The case for reading Stone 16’s protrusion as an intentional breast, and for hypothesising a matching feature on the lost Stone 15, is stronger than it was a decade ago.

A photogrammetric survey of Stone 16’s north-eastern face would be a worthwhile next step.

Photographs - Click to embiggen

 

 

References

Goskar, T. A. (2015). “Neolithic Breton-Style Rock Art at Boscawen-ûn Stone Circle.” tom.goskar.com, 14 September 2015.

Goskar, T. A. (2024). “A Cornish Rock Art Discovery at Carn Leskys — the Carn of Burnings.” tom.goskar.com, 25 June 2024.

Scarre, C. (2011). Landscapes of Neolithic Brittany. Oxford: Oxford University Press.

Shee Twohig, E. (1981). The Megalithic Art of Western Europe. Oxford: Clarendon Press.

L’Helgouac’h, J. (1995). “La sculpture des mégalithes armoricains.” In Scarre, C. & Healy, F. (eds), Trade and Exchange in Prehistoric Europe. Oxford: Oxbow.

Kinnes, I. (1995). “Statue-menhirs and allied representations in Northern France and the Channel Islands.” In Casini, S., de Marinis, R. C. & Pedrotti, A. (eds), Statue-Stele e massi Incisi nell’Europa dell’Età del Rame. Notizie Archeologiche Bergomensi 3, pp. 131–41.

Kohring, S. (2015). “Stepping Stones: Art and Community on Prehistoric Guernsey, Channel Islands.” Oxford Journal of Archaeology 34(3), pp. 301–16.