Ancient Monuments

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Castell Dyffrynmawr

A Scheduled Monument in Crymych, Pembrokeshire (Sir Benfro)

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Coordinates

Latitude: 51.9849 / 51°59'5"N

Longitude: -4.6593 / 4°39'33"W

OS Eastings: 217483

OS Northings: 235171

OS Grid: SN174351

Mapcode National: GBR CZ.K4Y5

Mapcode Global: VH2N8.6C5P

Entry Name: Castell Dyffrynmawr

Scheduled Date: 2 August 1950

Source: Cadw

Source ID: 3045

Cadw Legacy ID: PE208

Schedule Class: Defence

Category: Motte

Period: Medieval

County: Pembrokeshire (Sir Benfro)

Community: Crymych

Traditional County: Pembrokeshire

Description

The monument comprises the remains of a motte and ditch, dating to the medieval period (c. 1066 -1540 AD). A motte is a large conical or pyramidal mound of soil and/or stone, usually surrounded by either a wet or dry ditch, and originally surmounted by a tower constructed of timber or stone. Castell Dyffrynmawr motte measures c 60m in diameter and rises c 7m high from a u-shaped ditch generally about 3m deep. Outside the ditch there is a small counterscarp bank about 1m high and 4 to 5 m wide. The top of the motte has a saucer shaped depression 3.3m deep, an old scar on the north west side resulting from stone-robbing indicates the top is surmounted by a perimeter wall built of flat stone slabs surviving to at least three courses high.

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: Cadw

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