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Cof Cymru: National Historic Assets of Wales · Wales

Hen Blas Castle Site

Bagillt, Flintshire, Wales

A scheduled monument in Bagillt, Flintshire, recorded as Castle (Medieval).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Hen Blas Castle Site, Bagillt, Flintshire, 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
Castle
Period
Medieval
Community
Bagillt
Unitary authority
Flintshire
Country
Wales
Coordinates (centre of the scheduled area)
53.25212, -3.16842
SAM number
FL062
Cadw record number
2200

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 1795 map "To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most humbly inscribed by his obedient humble servant" (Llyfrgell Genedlaethol Cymru – The National Library of Wales).

Historical maps covering this location

  • 1795 · To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most… (Llyfrgell Genedlaethol Cymru – The National Library of Wales)
  • 1883 · Watershed map England, Wales 3. (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 108 Flint (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 108 Flint (Outline) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (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 for the scheduled ancient monument.

The monument consists of the remains of a castle, dating to the medieval period. A castle is a defended residence or stronghold, built mainly of stone, in which the principal or sole defence comprises the walls and towers bounding the site. The monument consists of the remains of an enclosure approximately 48m north-south by 50m east-west sited on a spur-end between two streams flowing from west to east. The enclosure is defined by a ditch on the west and elsewhere by steep natural slopes. On the west is an outer enclosure 72m north-south by 78m, again ditched on the west. There is mention of a castle being built in this location in 1157 and captured in 1166. Excavations concluded in 1957 demonstrated that an earthwork castle was replaced by a fortified manor house in the early thirteenth century which was itself abandoned in the late fourteenth century.

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.

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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