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Cof Cymru: National Historic Assets of Wales · Wales

Abercynafon Neolithic Site

Talybont-on-Usk, Powys, Wales

The record

Designation
Scheduled monument
Site type
Waterlogged deposit
Period
Prehistoric
Date of designation
15 December 1998
Community
Talybont-on-Usk
Unitary authority
Powys
Country
Wales
Coordinates (centre of the scheduled area)
51.84737, -3.34338
SAM number
BR249
Cadw record number
870

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 1636 "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (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 two waterlogged deposits. One area has been archaeologically investigated and comprised split oak timbers used to create a platform or walking surface, extending out towards the centre of the present pond. The timbers were dated to between 2917 and 1717 BC, making it Neolithic. Earlier deposits possibly dating to the late 4th millennium BC were found beneath the structure and later deposits from the Roman period were also evident overlying the structure. Small scale boring tests in the second area demonstrated prehistoric evidence of a similar nature. Abercynafon is a unique and important archaeological site, the only one of its kind in Wales.

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

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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