Ancient Monuments

History on the Ground

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St Mary's Yard Castle Mound

A Scheduled Monument in Llanover (Llanofer), Monmouthshire (Sir Fynwy)

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Latitude: 51.7573 / 51°45'26"N

Longitude: -2.9434 / 2°56'36"W

OS Eastings: 334980

OS Northings: 206938

OS Grid: SO349069

Mapcode National: GBR J8.0DBD

Mapcode Global: VH79M.X3T4

Entry Name: St Mary's Yard Castle Mound

Scheduled Date: 3 February 1936

Source: Cadw

Source ID: 2361

Cadw Legacy ID: MM082

Schedule Class: Defence

Category: Motte

Period: Medieval

County: Monmouthshire (Sir Fynwy)

Community: Llanover (Llanofer)

Traditional County: Monmouthshire


The monument comprises the remains of a motte and ditch, dating to the medieval period (c. 1066 -1540 AD). The motte is located on the W bank of the river Usk, and the ground drops sharp below the site to the river. The motte consists of a steep sided, flat topped mound, 3.5m high, and is D-shaped with the straight side being adjacent to the river. The top is 16m long (N/S) and 13m wide. On the N side there is a ditch 1.8m deep and 4m wide.

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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