Ancient Monuments

History on the Ground

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Cilberllan ring cairn

A Scheduled Monument in Glascwm (Glasgwm), Powys

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Latitude: 52.1801 / 52°10'48"N

Longitude: -3.345 / 3°20'42"W

OS Eastings: 308129

OS Northings: 254386

OS Grid: SO081543

Mapcode National: GBR YR.4T1F

Mapcode Global: VH69T.YGZM

Entry Name: Cilberllan ring cairn

Scheduled Date: 16 March 2005

Source: Cadw

Source ID: 4131

Cadw Legacy ID: RD226

Schedule Class: Religious, Ritual and Funerary

Category: Ring cairn

Period: Prehistoric

County: Powys

Community: Glascwm (Glasgwm)

Traditional County: Radnorshire


The monument comprises the remains of a ring cairn, probably dating to the Bronze Age (c.2300 BC - 800 BC) and situated within open moorland on a SE-facing terrace below the summit of the hill on the E side of the Carneddau. The well-preserved ring cairn is circular on plan and measures about 15m in diameter over a substantial stony ring bank spread to about 3m in thickness and up to 0.6m in height.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual. The monument is well preserved and is an important relic of a prehistoric funerary and ritual landscape. It retains significant archaeological potential, with a strong probability of the presence of both intact burial or ritual deposits and environmental and structural evidence.

The area scheduled comprises the remains described and an area around them within which related evidence may be expected to survive. It is circular and measures 32m in diameter.

Source: Cadw

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