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Cof Cymru: National Historic Assets of Wales · Wales

Beddau'r Derwyddon

Cyngor Bro Dyffryn Cennen, Carmarthenshire, Wales

A scheduled monument in Cyngor Bro Dyffryn Cennen, Carmarthenshire, recorded as Pillow Mound (Post Medieval/Modern).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Beddau'r Derwyddon, Cyngor Bro Dyffryn Cennen, Carmarthenshire, 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
Pillow Mound
Period
Post Medieval/Modern
Date of designation
5 February 1952
Community
Cyngor Bro Dyffryn Cennen
Unitary authority
Carmarthenshire
Country
Wales
Coordinates (centre of the scheduled area)
51.84587, -3.92625
SAM number
CM154
Cadw record number
429

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 1860 map "41. Caermathen." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1860 · 41. Caermathen. (David Rumsey Map Collection, Stanford Libraries)
  • 1891 · Sheet 10. Ordnance Survey of England and Wales. . (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 230 Ammanford (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 230 Ammanford (Outline) (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 general description of the Scheduled Ancient Monument.

The monument consists of the remains of two pillow mound, pillow-shaped, flat topped rectangular mounds often surrounded by a shallow ditch and used to farm rabbits. Both mounds are oriented north north west to south south east. The northern mound measures 26m in length, is c 1m high, rectangular and has squared ends with ditches along the long sides. The southern mound measures 18m in length and is c 1m high, it is similar in form to the other.

The monument is of national importance for its potential to enhance our knowledge of agricultural techniques. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits.

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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