Ancient Monuments

History on the Ground

This site is entirely user-supported. See how you can help.

Nant y Postau round cairn

A Scheduled Monument in Rhayader (Rhaeadr Gwy), Powys

We don't have any photos of this monument yet. Why don't you be the first to send us one?

Upload Photo »

Approximate Location Map
Large Map »

If Google Street View is available, the image is from the best available vantage point looking, if possible, towards the location of the monument. Where it is not available, the satellite view is shown instead.


Latitude: 52.2469 / 52°14'48"N

Longitude: -3.5798 / 3°34'47"W

OS Eastings: 292237

OS Northings: 262146

OS Grid: SN922621

Mapcode National: GBR YF.0GPX

Mapcode Global: VH5CV.WSVD

Entry Name: Nant y Postau round cairn

Scheduled Date: 19 August 2008

Source: Cadw

Source ID: 4341

Cadw Legacy ID: BR395

Schedule Class: Religious, Ritual and Funerary

Category: Round cairn

Period: Prehistoric

County: Powys

Community: Rhayader (Rhaeadr Gwy)

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 saddle between Gro Hill to the SE and a N-facing spur to the NW of Gro Hill. The stone-built cairn is circular on plan and measures about 6m in diameter and 0.8m in height. The cairn has a well-defined edge and appears to be 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 structural evidence and intact burial or ritual deposits. The topographic association with the other cairns and cairn cemetery on Gro Hill (BR394 and BR396 - BR398) and the major stone circle to the E (BR274) further increases its importance.

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 20m in diameter.

Source: Cadw

Other nearby scheduled monuments is an independent online resource and is not associated with any government department. All government data published here is used under licence. Please do not contact for any queries related to any individual ancient or schedued monument, planning permission related to scheduled monuments or the scheduling process itself. is a Good Stuff website.