Gwynedd Archaeological Trust
Regional Historic Environment Record

Burial Chamber, Possible Remains of, Castellor

Primary Reference Number (PRN) : 1539
Trust : Gwynedd
Community : Bryngwran
Unitary authority : Ynys Mon
NGR : SH33497614
Site Type (preferred type first) : PREHISTORIC CHAMBERED TOMB
Status : Scheduled Monument

Description :
Two stones of a cromlech (largest 9ft x 5.5ft x 3ft thick) are (1871) the only visible remains in this particular grid (plus another stone). Its capstone was broken up many years ago. <1>

The so called cromlech part of which is still visible (1937) seems to have been a natural feature. (RCAHMW, 1937)

The cromlech appears to be a group of natural erratics. <3>

4 very large boulders. The 2 largest are possible in situ erratics. Another very large - several tons - deliberately placed against the 2 others and another, somewhat smaller has been deliberately placed to form a capstone across the two larger, forming a 'chamber' open to the east. The capstone has since split in 2 and collapsed into the chamber. At least partly man-made but could have been carried out during post-medieval clearance. However, the effort involved seems unjustified so a prehistoric date seems reasonable. Unfortunately, despite being scheduled the whole field has been thoroughly ploughed and reseeded so little remains of the former settlement. (Smith, 2003)

“This stood on low ground quite in a swamp the cap stone like that at Maen Llhwyd has been thrown down and its supporters lie near it. Also many other stones from three to five feet long to the number of thirty lie scattered in all directions around it.” (Skinner, 1802) (Sketch on p. 47).

Sources :
McGuinness, N. , 2021 , Parc Solar Traffwll, Llanfihangel Yn Nhowyn, Ynys Mon: Historic Asset Setting Impact, Stages 1 and 2 ( © Gwynedd Archaeological Trust (GAT))
Skinner, Rev J. , 1908 , Ten Days' Tour Through The Isle of Anglesea, December 1802
Smith, G. , 2003 , Prehistoric Funerary and Ritual Monument Survey: West Gwynedd and Anglesey ( © GAT)
Smith, G., and Steele, N. , 2005 , Pan-Wales Prehistoric Funerary and Ritual Sites Survey: Trial Data Synthesis ( © GAT)
The Royal Commission on the Ancient and Historical Monuments of Wales , 1937 , An Inventory of the Ancient Monuments in Anglesey
Pritchard, H. , 1871 , Archaeology in Wales , <1>
Ordnance Survey , 1970 , SH37NW 4 , <3>
Thompson, D. , 1989 , PRN 1539 , <5>

Events :
42035 : An 088 Fmw Site Visit (year : 1986)
42036 : Prn 1539 Gat Site Visit (year : 1989)
40526 : Prehistoric Funerary and Ritual Monument Survey: West Gwynedd/Anglesey (year : 2003)
40527 : Pan-wales Prehistoric Funerary and Ritual Sites Survey: Trial Data Synthesis (year : 2005)
45992 : Parc Solar Traffwll: Historic Asset Setting Impact Assessment (year : 2021)

Related records

Compiled date : 16-02-1989


The above data are supplied by GAT in partnership with its Local Authorities (Anglesey, Conwy and Gwynedd County Councils, and Snowdonia National Park Authority), © GAT 2025 (and in part © Crown, 2025 - as indicated)
This information is supplied for the purposes of personal interest only and may not be used as part of a commercial project.

March 29, 2025, 2:25 am - HTML file produced from Gwynedd Archaeological Trust Regional HER
Gwynedd Archaeological Trust, Craig Beuno, Garth Road, Bangor, Gwynedd.  LL57 2RT
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