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Cof Cymru: National Historic Assets of Wales · Wales

Aber-Naint Dyke

Llanfyllin, Powys, Wales

A scheduled monument in Llanfyllin, Powys, recorded as Linear Earthwork (Early Medieval).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Aber-Naint Dyke, Llanfyllin, 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
Linear Earthwork
Period
Early Medieval
Community
Llanfyllin
Unitary authority
Powys
Country
Wales
Coordinates (centre of the scheduled area)
52.78732, -3.29927
SAM number
MG024
Cadw record number
2618

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)
  • 1897 · 137 Oswestry (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)
  • 1916 · Sheet 60. Shrewsbury. (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 consists of the remains of a dyke, a defensive boundary or earthwork, dating to the later prehistoric/medieval period. The earthwork comprises a bank aligned north-west to south-east on a slightly curving course with a ditch on the north side along most of its length. The overall length is about 560m and the height of the bank around 4.0m with a ditch 2.0m deep.

The monument is of national importance for its potential to enhance our knowledge of later prehistoric/medieval defensive organisation and settlement. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. A dyke may be part of a larger cluster of monuments and their importance can 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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