Ancient Monuments

History on the Ground

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Burial Chamber at Pen-yr-Alltwen

A Scheduled Monument in Cilybebyll, Neath Port Talbot (Castell-nedd Port Talbot)

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Latitude: 51.7142 / 51°42'50"N

Longitude: -3.8375 / 3°50'14"W

OS Eastings: 273152

OS Northings: 203311

OS Grid: SN731033

Mapcode National: GBR H1.39GB

Mapcode Global: VH4JZ.F5NR

Entry Name: Burial Chamber at Pen-yr-Alltwen

Scheduled Date: 2 June 1998

Source: Cadw

Source ID: 896

Cadw Legacy ID: GM514

Schedule Class: Religious, Ritual and Funerary

Category: Chambered tomb

Period: Prehistoric

County: Neath Port Talbot (Castell-nedd Port Talbot)

Community: Cilybebyll

Built-Up Area: Pontardawe

Traditional County: Glamorgan


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 tomb consists of two chambers, both constructed from large upright sandstone slabs and originally covered by a large capstone

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 retains significant archaeological potential, with a strong probability of the presence of both intact burial or ritual deposits and environmental 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 and areas around them within which related evidence may be expected to survive.

Source: Cadw

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