Ancient Monuments

History on the Ground

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Cilwhybert Castle Mound

A Scheduled Monument in Glyn Tarell, Powys

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Latitude: 51.9309 / 51°55'51"N

Longitude: -3.4349 / 3°26'5"W

OS Eastings: 301439

OS Northings: 226794

OS Grid: SO014267

Mapcode National: GBR YM.NGMF

Mapcode Global: VH6BY.DQZM

Entry Name: Cilwhybert Castle Mound

Scheduled Date:

Source: Cadw

Source ID: 1762

Cadw Legacy ID: BR127

Schedule Class: Defence

Category: Motte

Period: Medieval

County: Powys

Community: Glyn Tarell

Traditional County: Brecknockshire


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. Modrydd (Old Manor Farm, Cilwhybert) is a moderate-sized motte 33m in diameter at the base and approximately 4.5m high, with steep sides and a flat summit 11m wide. The motte is surrounded by a ditch, 6m wide and 2m deep with a counterscarp on the western side. The ditch holds water on the northern and western sides. The modern farm buildings to the south of the motte are probably located on the site of the Bailey. Some small scale excavations undertaken in the past have revealed that the motte is largely made of river boulders.

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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