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Cof Cymru: National Historic Assets of Wales · Wales

Castell Pen-Gawsai

Mynachlog-Ddu, Pembrokeshire, Wales

A scheduled monument in Mynachlog-Ddu, Pembrokeshire, recorded as Earthwork (unclassified) (Medieval).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Castell Pen-Gawsai, Mynachlog-Ddu, Pembrokeshire, 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
Earthwork (unclassified)
Period
Medieval
Date of designation
18 June 1952
Community
Mynachlog-Ddu
Unitary authority
Pembrokeshire
Country
Wales
Coordinates (centre of the scheduled area)
51.91882, -4.74930
SAM number
PE289
Cadw record number
3723

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 1636 map "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1636 · Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ... (David Rumsey Map Collection, Stanford Libraries)
  • 1891 · Sheet 10. Ordnance Survey of England and Wales. . (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 210 Cardigan (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 210 Cardigan (Outline) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 13. (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 comprises the remains of an earthwork ringwork likely to date to the medieval period (c. AD 1066 - 1485). It is oval shaped and measures 24m by 20m overall and comprises a well preserved bank 3.3m high externally, 1.3-1.8m high internally enclosing a possible building site measuring 9m by 6m. There is a possible entrance on the south east side and a surrounding ditch surviving to a depth of 0.3-0.6m.

The monument is of national importance for its potential to enhance our knowledge of medieval settlement, organisation and defence. The site forms an important element within the wider medieval landscape. It is well preserved and retains considerable archaeological potential. There is a strong probability of the presence of evidence relating to chronology, layout, building techniques and functional detail.

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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