id: sig-20260722-report-pe169
site_id: gb-cilgerran-pen-allt
attribute: designation_report
value: 'Reference Number

  PE169

  Name

  Castell Pen-yr-Allt

  Date of Designation

  Status

  Designated

  Unitary Authority

  Pembrokeshire

  Community

  Cilgerran

  Easting

  215784

  Northing

  242046

  Broad Class

  Defence

  Site Type

  Castle

  Period

  Medieval

  The monument comprises the remains of a motte and bailey castle a military stronghold built
  during the medieval period though located on the site of an earlier Iron Age promontory
  fort.  A motte and bailey castle comprises a large conical or pyramidal mound of soil or
  stone (the motte) surrounded by, or adjacent to, one or more embanked enclosures (the bailey).
  Both may be surrounded by wet or dry ditches and could be further strengthened with palisades,
  revetments, and/or a tower on top of the motte. The bailey, an area of c 60m north to south
  by 50m east to west, is enclosed by a bank and ditch; the; rock cut ditch, about 5m to 6m
  wide is evident on all sides except the north. The bank stands up to 7m above it but is
  absent on the west where there are the low remains of a stone wall along this side or possible
  stone building. There is a counterscarp to the ditch on the southern side. The motte is
  located in the southern part of the interior, it is 20m in diameter and 4m high, the collapsed
  remains of a masonry tower are on top. Geophysical survey undertaken in 2017 demonstrated
  that complex multivallate defences exist around the north side of the enclosure, comprising
  both ditches and stonework. A ditch was revealed curving around the northern side of the
  motte some 20m from its base together with a buried around the base. Buried walling was
  revealed along both the southeast and southwest edges of the enclosure. There are other
  probable areas of buried stonework, and probable in-filled pits. The possible footings of
  earlier roundhouse were detected to the north of the motte.

  The monument is of national importance for its potential to enhance our knowledge of medieval
  and later prehistoric defensive organisation. The well-preserved monument forms an important
  element within the wider medieval and pre-historic context and the structure itself may
  be expected to contain archaeological information relating to chronology, 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.'
source_url: http://cadwpublic-api.azurewebsites.net/reports/sam/FullReport?lang=en&id=3702
source_title: Scheduled Monument Full Report — Castell Pen-yr-Allt
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.