Cof Cymru: National Historic Assets of Wales · Wales
Twyn Bryn Glas round cairn
Hirwaun, Rhondda Cynon Taff, Wales
The record
- Designation
- Scheduled monument
- Site type
- Round Cairn
- Period
- Prehistoric
- Date of designation
- 13 January 2004
- Community
- Hirwaun
- Unitary authority
- Rhondda Cynon Taff
- Country
- Wales
- Coordinates (centre of the scheduled area)
- 51.79432, -3.47314
- SAM number
- GM561
- Cadw record number
- 4010
Slide toward Today to fade the historical sheet and see the modern map underneath.
David Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford LibrariesDavid Rumsey Map Collection, Stanford Libraries
Shown on 5 historical map sheets, the earliest the 1636 "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).
Cadw's description
Summary description and reason for designation
The following provides a general description of the Scheduled Ancient Monument.
The monument comprises the remains of a round cairn probably dating to the Bronze Age (c.2300 BC - 800 BC). The cairn is situated in open moorland on the saddle between two prominent rocky knolls immediately to the south-east of Cadair Fawr. The cairn is circular on plan and measures about 10m in diameter and up to 0.6m in height. The cairn was partially excavated in 1958 (Webley 1962) and, having opened four small trenches and excavating to the bedrock beneath (and also exposing the earthfast structures in their entirety beneath the cairn material), the excavator described three periods of construction.
The monument is of national importance for its potential to enhance our knowledge of prehistoric burial rites and ritual, social organisation and the environment. The feature is an important relic of a prehistoric funerary and ritual landscape and retains significant archaeological potential. Its importance is further enhanced by the presence of an excavation report pertaining to a relatively early period of scientific field archaeology.
The area scheduled comprises the remains described and an area around them within which related evidence may be expected to survive.
Nearby in the register
- Cadair Fawr settlementHouse Platformunder 1 mi
- Cwm Cadlan Settlement and Field SystemHut Circleunder 1 mi
- Cader Fawr Round CairnRound Cairnunder 1 mi
- Cefn Sychbant Round CairnsRound Cairnunder 1 mi
Other entries of the same register within about three miles of this one, by straight line.