id: sig-20260722-report-mm006
site_id: gb-llantilio-crossenny-white
attribute: designation_report
value: 'Reference Number

  MM006

  Name

  White Castle

  Date of Designation

  Status

  Designated

  Unitary Authority

  Monmouthshire

  Community

  Llantilio Crossenny

  Easting

  337944

  Northing

  216773

  Broad Class

  Defence

  Site Type

  Castle

  Period

  Medieval

  The monument consists of the remains of a castle, dating to the medieval period, and, with
  Grosmont (MM007) and Skenfrith (MM088), is one of the Three Castles. White Castle was probably
  originally of earth and timber construction,

  built shortly after the Norman conquest by William Fitz Osbern to stamp his overlordship
  on the area. The great mound that the stone castle stands on, its deep surrounding moat
  and the crescent-shaped hornwork to the south may all have been part of this original castle.

  The stone-built castle is the result of two distinct phases of building, about 100 yeards
  apart. At the south-eastern end of the inner ward are the immensely thick foundations of
  the earliest stone building of the castle, a small squarish keep dating from the first half
  of the 12th century. At this time the stone keep would have been surrounded by a timber
  curtain wall. The stone curtain wall was built in the 1180s; it had no towers and was faceted,
  and the entrance was located at the southern end, adjacent to the keep. The next great phase
  of building was undertaken by the crown in the mid-13th century when the castle was granted
  to Lord Edward (later Edward I). This was his first castle in Wales, the antecedent to all
  his magnificent castles in North Wales. Works undertaken by Edward involved demolishing
  the original keep and reorientating the whole castle so the that the entrance was at the
  north-western end. A strong gatehouse with two round towers, doors, a portcullis and drawbridge
  was added at the new northern entrance, and round towers were built onto the angles of the
  curtain wall. Lastly, the outer ward, which may already have existed in timber with a ditch
  around it, was walled in stone with towers at the angles and a small gatehouse on the south-east
  side.

  All through its life the sole purpose of White Castle was military, and as a deterrent it
  suceeded admirably for it was never attacked. It is austere and functional; only arrowslits
  pierce the tower walls, and the moat is exceptionally deep and steep-sided. The only civilian
  concession was a chapel, whose chancel was on the second floor of the south-east tower and
  whose nave projected into the inner ward. Simple timber-framed buildings ranged along the
  interior of the east and west curtain walls within the inner ward: the kitchen with its
  circular oven on the west, the hall, buttery and pantry on the east and a well, private
  appartment and deep latrine pit to the south. Troops were probably garrisoned in the outer
  ward in timber buildings, with the troop commander probably lodging in the north-west tower.

  After Edward I''s pacification of Wales the castle remained in use as an administrative
  centre, but by the 16th century had fallen into ruin.

  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=2957
source_title: Scheduled Monument Full Report — White 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.