Ancient Monuments

History on the Ground

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Cefn Ddwysarn Camp

A Scheduled Monument in Llandderfel, Gwynedd

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Latitude: 52.931 / 52°55'51"N

Longitude: -3.5384 / 3°32'18"W

OS Eastings: 296688

OS Northings: 338179

OS Grid: SH966381

Mapcode National: GBR 6G.MBZP

Mapcode Global: WH670.ML7B

Entry Name: Cefn Ddwysarn Camp

Scheduled Date:

Source: Cadw

Source ID: 276

Cadw Legacy ID: ME063

Schedule Class: Monument

Category: Enclosure

Period: Prehistoric

County: Gwynedd

Community: Llandderfel

Traditional County: Merionethshire


The monument is a D-shaped enclosure situated on a NE-facing slope. The W side, situated on fairly level ground, is marked by a ditch with outer and inner banks. The bottom of the ditch is 1 - 1.3m below the top of the banks. The semi-circular part of the D, particularly the E side, situated on sloping ground, is marked by a double scarp, 10m apart; the outer one 1m high, the inner one 0.5m high. A pronounced terrace on the S side, and the remains of a rectangular structure in the SW corner, indicate later disturbance as described by the OS. There is no definite entrance except for a slight flattening of the bank on the east side. It is difficult to explain why a ditch was only dug along one side, although it may be that the work was unfinished and that there was an intention to carry the ditch all around the site. The interior measures 80m N-S and 70m E-W. There are a number of boulders lying on the W side, but they form no obvious pattern. The site is crossed by modern fences running NW-SE and NE-SW.

The monument is of national importance for its potential to enhance our knowledge of prehistoric land use, settlement and economy. It is well preserved and retains significant 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. It is roughly D-shaped on plan and measures 120m (N-S) by 110m (W-E) and is centred on SH96693818.

Source: Cadw

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