Barclodiad y Gawres, Anglesey

Rock art and rituals in a Neolithic passage grave

This late Neolithic passage grave sits on the highest point of a headland on the west coast of the island. What makes it particularly interesting and worth a visit is the rock art inside the tomb. However, the tomb yielded up another secret when it was excavated in the 1950’s – the remains of what has been described as a witch’s brew – a stew made from small animals, fish and reptiles ( ingredients listed above!).

Its name translates as ‘the giantess’s apronful’ and comes from a legend about a couple of giants who were walking to Anglesey to build a home and were carrying the stones with them. When the wife got exhausted after carrying the heavy stones in her apron she tipped them all out, creating the mound of stones that would have been visible on the headland before it was known to be a tomb.

The mound on the headland
The remains of the original entrance passage

After it was excavated, the tomb was restored and a mound reconstructed over it, so it is completely dark inside.  A 9m long passage leads to a cruciform shaped chamber constructed from large orthostats, 6 of which are covered in rock art.
The most impressive stone is the one that stands at the entrance to the chamber but as you shine your torch around the tomb you begin to see the spirals, zigzags and chevron patterns on the other stones. Perhaps a representation of the entoptic images induced during their rituals and ceremonies?


Megalithic art tends to be found inside passage tombs and is very rare in any of the other types of prehistoric tombs. Also, the evidence of rituals taking place inside the tomb is also more evident in passage graves.
With its rock art and evidence of ritual, Barclodiad y Gawres has similarities with the passage graves in the Boyne valley in Ireland.

The central chamber has recesses on each side of it and the cremated remains of 2 young men were found in one recess and some traces of bones found in the others.

In the main chamber there was evidence of a large hearth containing a fire that had been kept burning for a long time. This is where the stew remains were found.

Wrasse, eel, frog, toad, grass snake, shrew, mouse and hare had been made into a stew and  placed on the fire, probably to quench it. On top this, pebbles and limpet shells were placed. Pebbles and sometimes shells too, have been found in other passage graves and obviously had symbolic significance. Perhaps these objects and creatures were chosen because they belonged to the ‘other worlds’ of  water, the night and the underground.

The chamber in Barclodiad y Gawres is kept locked and you used to be able to collect a key from the shop in Llanfaelog and go and look round it yourself. Unfortunately, after some vandalism, you now have to arrange for a member of staff at the shop to accompany you and this is only possible at weekends and bank holidays between April and October.

This is one of two reconstructed passage graves on Anglesey, the other one being Bryn Celli Ddu.

Trefignath Tombs, Anglesey

An intriguing Neolithic burial site which contained 3 tombs under one long mound.

Trefignath probably started life as one traditional passage grave. Over the next few hundred years another tomb was built next to it and the cairn extended to form one long mound, which was later increased in length even more when yet another tomb was added to it.

It brings to mind the tombs at Malin More in Donegal or, on a much greater scale, the impressive Grey Cairns of Camster in Caithness.

Photo showing the remains of all 3 tombs, with the original one on the left and the final and best preserved tomb on the right

The first phase

The first tomb has a simple square chamber which was covered by a mound of stones and entered via a short passage on the north side.

The second phase

The second tomb was built on the eastern side of the first one. It was a rectangular tomb with a massive capstone (which is now broken) and 2 large stones marking the entrance. The mound over the first tomb was extended to cover this one as well, forming one long cairn. It  was faced with dry stone walling and a forecourt was added at the eastern end.

The scant remains of the second tomb with its broken capstone. The first tomb is visible behind it
Looking east from the second tomb with the last tomb to be built in front of it

The third phase

The third tomb was added to the eastern side of the second cairn and the mound extended to cover this one as well, thus blocking the entrance to the middle tomb. Two very tall portal stones mark the entrance.

The third, and last tomb to be built, has the best preserved chamber

 Trefignath was excavated in 1977-79 and was consolidated afterwards, with some partial (and not exactly sympathetic) reconstruction.

The tomb builders chose some highly textured stones with veins of quartz running through them

The cairn was built on a rocky outcrop which is slightly elevated above the surrounding low lying land. Its position in the landscape can still be appreciated despite being on the outskirts of Holyhead and the encroachment of modern development which is getting closer and closer!

Trefignath burial cairn with the aluminium works on the other side of the dual carriageway

It used to be accessed down a country road but since the building of the A55 dual carriageway and more recently, a new road and roundabouts into a development area, it now finds itself sandwiched between these two new roads.

There are no signposts to the monument, despite it being one of the important prehistoric sites on Anglesey but access and parking are very easy once you actually find it!

Ty Mawr Standing Stone

Two fields away and going back towards the roundabout is Ty Mawr standing stone. An impressive stone, even with Morrisons Supermarket as a backdrop!  Standing 9ft high and looking as if the stone has been twisted into this shape.

It isn’t known if this stone and 3 other smaller ones are contemporary with the burial mound or if they came later.

Presaddfed Burial Chambers

About 6 or 7 miles away, near Bodedern,  is another example of what was probably another multi-phase site on Anglesey.

The 2 Neolithic dolmens at Presaddfed

The dolmen on the right is still fairly intact but the other one just has an upright and a pile of collapsed stones. There is a written account of the dolmens in the mid-19th century which says that they were surrounded by a pile of stones and it is easy to imagine that they would once have been covered by one large cairn.

This is as close to the cows as I was prepared to go!

Bryn Celli Ddu

Bryn Celli Ddu (Welsh for the mound of the dark grove) is probably the best known prehistoric site on Anglesey and an excellent example of a passage grave. The tradition of building passage tombs spread up the Atlantic coast from western Spain to Britain and Ireland about 5000 years ago, towards the end of period of megalithic tomb building. In Ireland there are about 330, mainly in the east of the country, with the pinnacle of passage tomb building being the great tombs at Newgrange. On the other side of the Irish sea the best surviving examples in Wales are  Bryn Celli Ddu and Barclodiad y Gawres on Anglesey.

Passage graves consisted of a passage leading into a central chamber and then the structure was covered with a large mound of stones. Details in the design vary from tomb to tomb and and the passage was often deliberately aligned with solstice events, so that the rising or setting sun would shine down the passage and illuminate the chamber at a precise time of the year.

Bryn Celli Ddu is in the care of Cadw and there is a small park with interpretation boards telling you about prehistoric life on Anglesey and other sites you can visit. On the other side of the road a footpath enclosed by hedges leads up through the fields to the site.

As you emerge from the footpath and go through the gate you are facing what looks at first glance to be the entrance to the tomb – a concave area revealing a couple of orthostats topped by a roof slab and facing this on the edge of the mound, is a highly decorated standing stone.

This is actually the rear of the chamber, which was left exposed to allow some light into it. Personally, I would have preferred it if they had fully enclosed the chamber as the light detracts from the sense of mystery and other-worldliness you get when entering a dark tomb.


Entrance to Bryn Celli Ddu tomb

The entrance and the 8m long passage into the chamber is on the opposite side of the mound and what you see today is the result of excavation and reconstruction work in the 1920’s. Before this, there were stone remains but no mound. When excavations were completed, the chamber and the passage were covered by a mound, thus recreating a tomb similar to what it would have looked like when it was built in the early Bronze Age and giving visitors the experience of being able to enter a passage grave.

The passage is aligned so that the sun shines down the passage and illuminates the chamber at sunrise on the summer solstice.

Rather than replicating the full-sized mound which would have had its chamber in the centre, the covering cairn here only reaches as far back as the rear of the chamber and is much smaller than the original would have been. The remains of a ditch and outer ring of stones show the size of the original monument.

Bryn Celli Ddu has a fascinating history, probably going as far back as Mesolithic times and over the past few years it has come to light that Bryn Celli Ddu doesn’t stand alone but is  part of a prehistoric ritual landscape. Archaeologists have uncovered rock art, flint tools, pits containing pottery deposits and evidence of more burial mounds.

In Neolithic times, long before the passage grave was built, a stone circle stood at this site. This was surrounded by a ditch and an embankment. Sometime during this period as a henge, a pit was dug in the centre of the circle and a human ear bone placed in it. The pit was then filled in and covered with one or two stone slabs.  During excavations, a decorated stone slab was found next to the pit remains. The stone now standing outside the rear of the chamber is a replica of this and is next to the spot where the pit was found. The original is now in the National Museum of Wales.

About 1000 years after the construction of the stone circle, it was destroyed and a passage tomb was built on the site. When the tomb came to the end of its use a stone was placed at the entrance to seal it up. There was some evidence that part of the passage was infilled with smaller stones and some human bones placed in among them.



One of the most unusual features of the tomb is a free standing pillar which is situated within the chamber. This is made from the local blueschist stone and has been carved into a smooth shape.

Part of the pillar







More images of Bryn Celli Ddu