Ancient Monuments

History on the Ground

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Bedd yr Afanc Burial Chamber

A Scheduled Monument in Eglwyswrw, Pembrokeshire (Sir Benfro)

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Latitude: 51.9775 / 51°58'38"N

Longitude: -4.7562 / 4°45'22"W

OS Eastings: 210795

OS Northings: 234590

OS Grid: SN107345

Mapcode National: GBR CV.KQWF

Mapcode Global: VH2N6.HKXF

Entry Name: Bedd yr Afanc Burial Chamber

Scheduled Date:

Source: Cadw

Source ID: 707

Cadw Legacy ID: PE122

Schedule Class: Religious, Ritual and Funerary

Category: Chambered tomb

Period: Prehistoric

County: Pembrokeshire (Sir Benfro)

Community: Eglwyswrw

Traditional County: Pembrokeshire


The monument comprises the remains of a chambered tomb, dating to the Neolithic period (c. 4,400 BC - 2,900 BC). Chambered tombs were built and used by local farming communities over long periods of time. There appear to be many regional traditions and variations in shape and construction.

The long, low cairn of Bedd yr Afanc is about 18m long, 10.6m wide and 0.5m high; it is orientated east-west. Within the cairn is a 'gallery grave’ or long, simple, parallel-sided structure open at one short end. The main part, the passage, has an entrance on the east and is composed of about 10 pairs of upright stones 1m wide and up to 0.5m in height. It leads to a small circular chamber at the west end, delimited by seven boulders of roughly similar size, c. 2m x 1.8m. No capstones survive.

The name of the tomb translates as 'the grave of the monster’; the site was excavated in 1939

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual. The monument is an important relic of a prehistoric funerary and ritual landscape and structural evidence, including a buried prehistoric land surface. Chambered tombs 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.

Source: Cadw

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