Ancient Monuments

History on the Ground

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Llanthomas Castle Mound

A Scheduled Monument in Llanigon, Powys

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Latitude: 52.056 / 52°3'21"N

Longitude: -3.1548 / 3°9'17"W

OS Eastings: 320919

OS Northings: 240366

OS Grid: SO209403

Mapcode National: GBR F0.DL2G

Mapcode Global: VH6BJ.8LK6

Entry Name: Llanthomas Castle Mound

Scheduled Date:

Source: Cadw

Source ID: 3822

Cadw Legacy ID: BR078

Schedule Class: Defence

Category: Motte

Period: Medieval

County: Powys

Community: Llanigon

Traditional County: Brecknockshire


The monument comprises the remains of a motte and ditch, dating to the medieval period (c. 1066 -1540 AD). The motte comprises a large, steep sided oval mound measuring around 25m NW/SE and 21m NW/SW and 3m high. There is a shallow ditch surrounding the mound on the N and NW side, which peters out to the W, with no ditch on the S and E sides. To the E of the motte is the deep gully of the Digedi Brook, with a possible bailey location between.

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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