id: sig-20260722-report-gm094
site_id: gb-cowbridge-with-llanblethian-llanblethian
attribute: designation_report
value: 'Reference Number

  GM094

  Name

  Llanblethian Castle

  Date of Designation

  Status

  Designated

  Unitary Authority

  Vale of Glamorgan

  Community

  Cowbridge with Llanblethian

  Easting

  298893

  Northing

  174181

  Broad Class

  Defence

  Site Type

  Castle

  Period

  Medieval

  The monument consists of the remains of a castle dating to the medieval period. Llanblethian
  (aka St Quintin''s) comprises a large courtyard castle. The massive twin-towered gatehouse
  and high stretch of curtain wall on the north side are the main remnants. A ruinous low
  wall surrounds the rectilinear ward to the west. In the centre is a mound with the shell
  of a thick-walled building possibly an earlier keep on it. The gatehouse and curtain wall
  are thought to be early 14th century, built by Gilbert de Clare (the Last, d. 1314).

  The monument is of national importance for its potential to enhance our knowledge of medieval
  defensive practices. The monument is well-preserved and an important relic of the medieval
  landscape. It retains significant archaeological potential, with a strong probability of
  the presence of both structural evidence and intact associated deposits.

  The scheduled area comprises the remains described and areas around them within which related
  evidence may be expected to survive.'
source_url: http://cadwpublic-api.azurewebsites.net/reports/sam/FullReport?lang=en&id=3389
source_title: Scheduled Monument Full Report — Llanblethian Castle
publisher: Cadw
observed_date: '2026-07-22'
collected_by: scripts/build_assessment_batch.py
confidence: high
notes: The designation text. Assess the six bands against THIS evidence only; omit any band
  it does not speak to.