Ancient Monuments

History on the Ground

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Round Cairn and Ring Cairn South of Twyn-y-Glog

A Scheduled Monument in Hirwaun, Rhondda, Cynon, Taff (Rhondda Cynon Taf)

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Latitude: 51.7689 / 51°46'8"N

Longitude: -3.5056 / 3°30'20"W

OS Eastings: 296202

OS Northings: 208874

OS Grid: SN962088

Mapcode National: GBR YJ.ZP35

Mapcode Global: VH5G7.6S2V

Entry Name: Round Cairn and Ring Cairn South of Twyn-y-Glog

Scheduled Date: 28 September 1999

Source: Cadw

Source ID: 864

Cadw Legacy ID: GM523

Schedule Class: Religious, Ritual and Funerary

Category: Round cairn

Period: Prehistoric

County: Rhondda, Cynon, Taff (Rhondda Cynon Taf)

Community: Hirwaun

Traditional County: Brecknockshire


The monument comprises the remains of two burial cairns, probably dating to the Bronze Age (c. 2300 - 800 BC). They are both situated on the southern side of Twyn-y-Glog. The ring cairn is formed by a stony bank up to 3m wide, overall it measures 10m with banks rising to 0.4m above the interior. The nearby round cairn measures 10m in diameter and includes an arc of stone walling formed from large boulders on its northern side. Approximately 900m west, on Mynydd-y-Glog, are a large collection of Bronze Age round cairns. 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, together with environmental and structural evidence. Cairns 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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