Gwynedd Archaeological Trust
Regional Historic Environment Record

Trefwri Standing Stone, Brynsiencyn

Primary Reference Number (PRN) : 3145
Trust : Gwynedd
Community : Llanidan
Unitary authority : Ynys Mon
NGR : SH47616779
Site Type (preferred type first) : BRONZE AGE STANDING STONE
Status : Scheduled Monument

Description :
Maen Hir on the site of the destroyed hut group known as Tre Fwri 5 2/3ft high by 3ft wide with some packing stones. (RCAHMW, 1937)

There are two standing stones 'A' at SH47436783 and 'B' at SH47616779. 'B' is most probably the stone referred to above. <2>

The stone is on the site of a destroyed hut group known as Trefwri part of which is scheduled (A 87). Another stone c.180m W is no scheduled. Full description of the monument in 1986. <3>

The eastern stone is as described and looks like a genuine standing stone, slightly prismatic in cross-section but in an odd place on a slope just above the Afon Braint. The western stone is an irregular slabby boulder at 2.2m long, 0.8 thick and 1.6m high artificially set on edge, possibly just as a rubbing stone. (Smith, 2003)

The stone is on the site of a destroyed hut group known as Trefwri part of which is scheduled (An 087). Another stone c.180.0m west is not scheduled. The eastern stone looks like a genuine standing stone, slightly prismatic in cross-section but in an odd place on a slope just above the Afon Braint. The western stone is an irregular slabby boulder at 2.2m long, 0.8 thick and 1.6m high artificially set on edge, possibly just as a rubbing stone. (Cooke, 2013)

Sources :
Cooke, R. , 2013 , Bodrida Wind Turbine, Brynsiencyn, Isle of Anglesey: Archaeological Desk Based Assessment ( © Aeon Archaeology)
Cooke, R. & Evans, R. , 2012 , Proposed Wind Turbine at Tre Ifan, Brynsiencyn, Anglesey: Archaeological Assessment ( © GAT)
Senior, M. , 2003 , The Standing Stones of north-western Wales
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
Ordnance Survey , 1970 , SH46NE S , <2>
Lynch, F. , 1970 , Prehistoric Anglesey , <4>

Events :
42722 : An 086 Fmw Site Visit (year : 1986)
40526 : Prehistoric Funerary and Ritual Monument Survey: West Gwynedd/Anglesey (year : 2003)
44548 : Bodrida Wind Turbine, Brynsiencyn, Isle of Anglesey (year : 2013)
44662 : Proposed Wind Turbine at Tre Ifan, Brynsiencyn, Anglesey (year : 2012)
40527 : Pan-wales Prehistoric Funerary and Ritual Sites Survey: Trial Data Synthesis (year : 2005)

Related records
National Monuments Record Wales NPRN 302430 https://coflein.gov.uk/en/site/302430/

Compiled date : 31-03-2000


Images :



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.

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