Ancient Monuments

History on the Ground

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Castell Pen-Gawsai

A Scheduled Monument in Mynachlog-Ddu (Mynachlog-ddu), Pembrokeshire (Sir Benfro)

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Latitude: 51.9188 / 51°55'7"N

Longitude: -4.7493 / 4°44'57"W

OS Eastings: 211027

OS Northings: 228050

OS Grid: SN110280

Mapcode National: GBR CW.P6M5

Mapcode Global: VH2NL.M1LC

Entry Name: Castell Pen-Gawsai

Scheduled Date: 18 June 1952

Source: Cadw

Source ID: 3723

Cadw Legacy ID: PE289

Schedule Class: Monument

Category: Earthwork (unclassified)

Period: Early Medieval

County: Pembrokeshire (Sir Benfro)

Community: Mynachlog-Ddu (Mynachlog-ddu)

Traditional County: Pembrokeshire


The monument comprises the remains of an earthwork ringwork likely to date to the medieval period (c. AD 1066 - 1485). It is oval shaped and measures 24m by 20m overall and comprises a well preserved bank 3.3m high externally, 1.3-1.8m high internally enclosing a possible building site measuring 9m by 6m. There is a possible entrance on the south east side and a surrounding ditch surviving to a depth of 0.3-0.6m.

The monument is of national importance for its potential to enhance our knowledge of medieval settlement, organisation and defence. The site forms an important element within the wider medieval landscape. It is well preserved and retains considerable archaeological potential. There is a strong probability of the presence of evidence relating to chronology, layout, 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: Cadw

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