Ancient Monuments

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Three Round Cairns on the Southern Side of Mynydd-y-Glog

A Scheduled Monument in Llwydcoed (Llwytgoed), Rhondda, Cynon, Taff (Rhondda Cynon Taf)

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Latitude: 51.7645 / 51°45'52"N

Longitude: -3.4817 / 3°28'54"W

OS Eastings: 297840

OS Northings: 208348

OS Grid: SN978083

Mapcode National: GBR HJ.02XP

Mapcode Global: VH5G7.LXP7

Entry Name: Three Round Cairns on the Southern Side of Mynydd-y-Glog

Scheduled Date: 29 September 1999

Source: Cadw

Source ID: 1588

Cadw Legacy ID: GM525

Schedule Class: Religious, Ritual and Funerary

Category: Round cairn

Period: Prehistoric

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

Community: Llwydcoed (Llwytgoed)

Traditional County: Brecknockshire


The monument comprises the remains of three burial cairns, probably dating to the Bronze Age (c. 2300 - 800 BC). The monument also includes the foundations of a later, possibly medieval, rectangular building measuring 7m by 5m, probably constructed of stones taken from the cairns. The cairns measure between 8.5m and 16m in diameter survive to an average height of 1m. The cairns are situated within sight of each other on the southern side of the summit of Mynydd-y-Glog. There are further cairns 400m to the north on the summit of Mynydd-y-Glog.

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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