Ancient Monuments

History on the Ground

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Site east of Plas-Llwyn (revealed by aerial photography)

A Scheduled Monument in Berriew (Aberriw), Powys

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Latitude: 52.6039 / 52°36'14"N

Longitude: -3.1824 / 3°10'56"W

OS Eastings: 320021

OS Northings: 301340

OS Grid: SJ200013

Mapcode National: GBR 9Y.954L

Mapcode Global: WH79W.2TV3

Entry Name: Site E of Plas-Llwyn (revealed by aerial photography)

Scheduled Date:

Source: Cadw

Source ID: 2018

Cadw Legacy ID: MG174

Schedule Class: Monument

Category: Enclosure

Period: Early Medieval

County: Powys

Community: Berriew (Aberriw)

Traditional County: Montgomeryshire


The monument comprises the remains of a crop-mark enclosure. The date or precise nature of the enclosure is unknown, but it is possibly early medieval. Aerial photography shows a ditched enclosure measuring c 30m NE-SW by 15m wide. It appears to be surrounded by outer ditch c 50m x 30m. No surface features are visible.

The monument is of national importance for its potential to enhance our knowledge of later prehistoric defensive organisation and settlement. The site forms an important element within the wider later prehistoric context and within the surrounding landscape. The site is well preserved and retains considerable archaeological potential. There is a strong probability of the presence of evidence relating to chronology, building techniques and functional detail.

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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