Ancient Monuments

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Gwern-y-Domen Castle Mound

A Scheduled Monument in Van (Y Fan), Caerphilly (Caerffili)

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Latitude: 51.5836 / 51°35'1"N

Longitude: -3.1921 / 3°11'31"W

OS Eastings: 317501

OS Northings: 187871

OS Grid: ST175878

Mapcode National: GBR HX.CHSG

Mapcode Global: VH6DT.MGBB

Entry Name: Gwern-y-Domen Castle Mound

Scheduled Date: 20 April 1953

Source: Cadw

Source ID: 3109

Cadw Legacy ID: GM218

Schedule Class: Defence

Category: Motte

Period: Medieval

County: Caerphilly (Caerffili)

Community: Van (Y Fan)

Traditional County: Glamorgan


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 surmounted by a tower constructed of timber or stone.

The motte stands in a marshy field, butting onto a disused railway line on its south-west side. It is a large steep sided mound, 30m in diameter, c. 5m high. The top is flat, 20m in diameter, with a lip up to 2m high on the south side, 1m high on the north side. On the east side at the foot of the mound is a flat berm, c.4m wide, with a drop of c. 0.5m to the marshy field. This continues round to the north, where it is more bank like, until it is cut off by a field ditch.

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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