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Cof Cymru: National Historic Assets of Wales · Wales

Blaen y Cwm Round Barrow

Llansannan, Conwy, Wales

The record

Designation
Scheduled monument
Site type
Round Barrow
Period
Prehistoric
Community
Llansannan
Unitary authority
Conwy
Country
Wales
Coordinates (centre of the scheduled area)
53.13472, -3.58726
SAM number
DE124
Cadw record number
3603

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1795 "To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most humbly inscribed by his obedient humble servant" (Llyfrgell Genedlaethol Cymru – The National Library of Wales).

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This record in Cadw's own full report ↗

Cadw's description

The following provides a general description of the Scheduled Monument.

The monument comprises the remains of a very large earth-built round barrow, a burial mound which probably dates to the Bronze Age (c.2300 - 800 BC). The barrow is circular in shape on plan, with a diameter of some 34m and has a rounded profile up to 4.5m high.

The barrow is located on the northern scarp of Mynydd Hiraethog (Denbigh Moors) with higher ground to the southwest. Significant views are therefore north-east along the valley of the Afon Hyrdd in an arc from south-east to north-west.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. It is an important relic of a prehistoric funerary and ritual landscape and retains significant archaeological potential. There is a strong probability of the presence of both intact ritual and burial deposits, together with environmental and structural evidence. The importance of this barrow is further enhanced by its proximity to and group value with the Rhiwiau round barrow cemetery (DE100).

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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