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.
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 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!
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.