Ancient Monuments

History on the Ground

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Ty-Newydd Dyke

A Scheduled Monument in Llanrhaeadr-ym-Mochnant, Powys

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Latitude: 52.7999 / 52°47'59"N

Longitude: -3.288 / 3°17'16"W

OS Eastings: 313258

OS Northings: 323258

OS Grid: SJ132232

Mapcode National: GBR 6S.WRSM

Mapcode Global: WH78V.GWHD

Entry Name: Ty-Newydd Dyke

Scheduled Date:

Source: Cadw

Source ID: 1978

Cadw Legacy ID: MG025

Schedule Class: Monument

Category: Linear earthwork

Period: Unknown

County: Powys

Community: Llanrhaeadr-ym-Mochnant

Traditional County: Montgomeryshire


The monument consists of the remains of a dyke, a defensive boundary or earthwork, probably dating to the early medieval period. Ty-Newydd Dyke is 0.83km long, aligned east-west across a stretch of lower ground between the hills known as Allt Tair Ffynnon and Garth. It faces north towards the Tanat Valley. A bank with a ditch to the north are clearly visible, with, in places sections of scarp.

The monument is of national importance for its potential to enhance our knowledge of later prehistoric/medieval defensive organisation and settlement. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. A dyke may be part of a larger cluster of monuments and their importance can further enhanced by their group value.

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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