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Cof Cymru: National Historic Assets of Wales · Wales

Rectangular Earthwork 110m NW of Coed Ty Mawr

Llanddeiniolen, Gwynedd, Wales

A scheduled monument in Llanddeiniolen, Gwynedd, recorded as Moated Site (Medieval).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Rectangular Earthwork 110m NW of Coed Ty Mawr, Llanddeiniolen, Gwynedd, 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
Moated Site
Period
Medieval
Community
Llanddeiniolen
Unitary authority
Gwynedd
Country
Wales
Coordinates (centre of the scheduled area)
53.17531, -4.16293
SAM number
CN156
Cadw record number
3490

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 1896 map "Sheet 7. Ordnance Survey of England and Wales." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1896 · Sheet 7. Ordnance Survey of England and Wales. (David Rumsey Map Collection, Stanford Libraries)
  • 1899 · 106 Bangor (Outline) (David Rumsey Map Collection, Stanford Libraries)
  • 1899 · 106 Bangor (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)
  • 1919 · Sheet 41. Anglesey. (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 comprises the remains of a well-preserved medieval moated homestead. There are two ditches and a central bank with traces of an external bank on the NE and SW sides. The two ditches may be connected on the NE and SW sides. The interior is 42m by 34m and contains traces of a building in the E corner. The entrance appears to have been on the NW side, where there is a stone causeway cutting through the two ditches, about 4.5m wide. The E corner of the site, which lies in a separate field, has been filled in and the ditches are not visible from the ground. A modern field wall crosses the site from NW to SE and in addition to this there is a denuded bank running across the site from SW to NE, the line of which is marked by two oak trees. The ditches appear to have been fairly shallow, although in the N corner the exterior ground surface rises one metre above the level of the outer ditch.

The monument is of national importance for its potential to enhance our knowledge of medieval settlement and defence. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structure itself may be expected to contain archaeological information concerning chronology and building techniques.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive and is a square with sides of 100m.

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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