Ancient Monuments

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Castell Coch Promontory Fort

A Scheduled Monument in Mathry (Mathri), Pembrokeshire (Sir Benfro)

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Latitude: 51.9608 / 51°57'38"N

Longitude: -5.1455 / 5°8'43"W

OS Eastings: 183989

OS Northings: 233823

OS Grid: SM839338

Mapcode National: GBR CB.LQC9

Mapcode Global: VH1QJ.RZN6

Entry Name: Castell Coch Promontory Fort

Scheduled Date:

Source: Cadw

Source ID: 3336

Cadw Legacy ID: PE029

Schedule Class: Defence

Category: Promontory Fort - inland

Period: Prehistoric

County: Pembrokeshire (Sir Benfro)

Community: Mathry (Mathri)

Traditional County: Pembrokeshire


The monument comprises the remains of a defended enclosure, which probably dates to the Iron Age period (c. 800 BC - AD 43). The enclosure is located on a narrow coastal promontory above the sea, high cliffs form apart of the defensive circuit on three sides whilst the narrowest part of the promontory is defended by an outer rock-cut ditch about 4m wide, 2m deep and 50m long, on the inner side of which are two banks of earth and stone about 1m high. The internal defended area measures about 200m east to west and 100m north to south. The location of the entrance may be a simple gap towards the south end of the defences. A single circular terrace, probably a house site has been noted in the interior.

The monument is of national importance for its potential to enhance our knowledge of later prehistoric defensive organisation and settlement. The site forms an important element within the wider later prehistoric context and within the surrounding landscape. The site 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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