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Cof Cymru: National Historic Assets of Wales · Wales

Pen-y-Garn-Goch Long Barrow

Treflys, Powys, Wales

A scheduled monument in Treflys, Powys, recorded as Round Barrow (Prehistoric).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Pen-y-Garn-Goch Long Barrow, Treflys, Powys, 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
Community
Treflys
Unitary authority
Powys
Country
Wales
Coordinates (centre of the scheduled area)
52.13949, -3.63095
SAM number
BR066
Cadw record number
1728

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 1608 map "(13) Cambriae Typus." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1608 · (13) Cambriae Typus. (David Rumsey Map Collection, Stanford Libraries)
  • 1637 · Particular description of Wales. Cambria seu Wallia (David Rumsey Map Collection, Stanford Libraries)
  • 1830 · V.3:11-15:XV. Britisches Reich. A. Kon: England. b. Frstenthum Wales: Shire: 37-40 (David Rumsey Map Collection, Stanford Libraries)
  • 1899 · 196 Builth (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 14. (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 summary description of the monument.

The monument comprises the remains of three conjoined round barrows, probably dating to the Bronze Age (c. 2300 BC - 800 BC). The barrows were described by W.F. Grimes as a long barrow of the Cotswold-Severn tradition, however no surface evidence could be found for a chamber and the site is now recognised as comprising multiple round barrows. The three barrows form an elongated oval monument, roughly 70m N/S and 30m E/W, with three distinct mounds defining each individual barrow. The barrows are constructed from rounded stones and boulders and have not been excavated but have been altered with hollows made into the stone cairns to create shelters, probably for use by shepherds.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. The monument is well preserved and is an important relic of a prehistoric funerary and ritual landscape. It retains significant archaeological potential, with a strong probability of the presence of ritual deposits together with environmental and structural evidence. Round 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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