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Cof Cymru: National Historic Assets of Wales · Wales

Twll y Darren Round Barrow

Llanegryn, Gwynedd, Wales

A scheduled monument in Llanegryn, Gwynedd, recorded as Round Barrow (Prehistoric).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Twll y Darren Round Barrow, Llanegryn, Gwynedd, with a pin at the register's coordinates
Ordnance Survey six-inch map, 2nd edition (1888–1913), covering this location. Courtesy of the National Library of Scotland. The pin is ours, placed from the register's coordinates.

The record

Designation
Scheduled monument
Site type
Round Barrow
Period
Prehistoric
Date of designation
14 May 2003
Community
Llanegryn
Unitary authority
Gwynedd
Country
Wales
Coordinates (centre of the scheduled area)
52.65796, -4.03508
SAM number
ME222
Cadw record number
3937

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

David Rumsey Map Collection, Stanford Libraries

5 historical maps cover this location, the earliest the 1795 map "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).

Historical maps covering this location

  • 1795 · To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most… (Llyfrgell Genedlaethol Cymru – The National Library of Wales)
  • 1883 · Watershed map England, Wales 3. (David Rumsey Map Collection, Stanford Libraries)
  • 1896 · Sheet 7. Ordnance Survey of England and Wales. (David Rumsey Map Collection, Stanford Libraries)
  • 1899 · 149 Barmouth (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)

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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 a prominent, well-preserved and largely intact round barrow, which probably dates to the Early Bronze Age (c. 2000-1500 BC). The monument is some 11m in diameter by 0.9m high and is unusual in a Welsh upland context in comprising a barrow of earth rather than the more usual cairn of stones. The monument is associated with the Allt Lwyd Bronze Age ritual complex and burial cairns.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. The features are an important relic of a prehistoric funerary and ritual landscape and retain significant archaeological potential. There is a strong probability of the presence of intact ritual and burial deposits, environmental and structural evidence and preserved prehistoric ground surfaces below the monument. Barrows may be part of a larger cluster of monuments and their importance can be further enhanced by their group value.

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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