Ancient Monuments

History on the Ground

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Twyn yr Odynau round cairn

A Scheduled Monument in Ystradfellte, Powys

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Latitude: 51.8241 / 51°49'26"N

Longitude: -3.5256 / 3°31'32"W

OS Eastings: 294954

OS Northings: 215040

OS Grid: SN949150

Mapcode National: GBR YH.WB3Q

Mapcode Global: VH5G0.VF10

Entry Name: Twyn yr Odynau round cairn

Scheduled Date: 9 November 2006

Source: Cadw

Source ID: 1102

Cadw Legacy ID: BR343

Schedule Class: Religious, Ritual and Funerary

Category: Round cairn

Period: Prehistoric

County: Powys

Community: Ystradfellte

Traditional County: Brecknockshire


The monument comprises the remains of a burial cairn, probably dating to the Bronze Age (c.2300 BC - 800 BC) and situated in open moorland on a distinct W-facing terrace above Cwm Dringarth and on the NW-facing slopes of Mynydd y Garn. The stone-built cairn is circular on plan and measures about 7.5m in diameter and up to 0.4m in height. Although it has been disturbed in the past - the footings of a small subrectangular hut are visible on the summit of the cairn - the majority of the base of the cairn appears to remain intact.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. The monument is an important relic of a prehistoric funerary and ritual landscape and retains significant archaeological potential, with a strong probability of the presence of both intact burial or ritual deposits and environmental and structural evidence. The topographic association of the cairn with both several other Bronze Age burial cairns and the fragmentary survival of likely contemporary settlement sites and field systems further enhances the importance of the site.

The scheduled area comprises the remains described and an area around them within which related evidence may be expected to survive. It is circular and measures 22m in diameter.

Source: Cadw

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