Ancient Monuments

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Tre-Wallter Llwyd Burial Chamber

A Scheduled Monument in Mathry (Mathri), Pembrokeshire (Sir Benfro)

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Latitude: 51.9434 / 51°56'36"N

Longitude: -5.103 / 5°6'10"W

OS Eastings: 186824

OS Northings: 231760

OS Grid: SM868317

Mapcode National: GBR CD.MNX9

Mapcode Global: VH1QR.HFM1

Entry Name: Tre-Wallter Llwyd Burial Chamber

Scheduled Date:

Source: Cadw

Source ID: 3558

Cadw Legacy ID: PE037

Schedule Class: Religious, Ritual and Funerary

Category: Chambered tomb

Period: Prehistoric

County: Pembrokeshire (Sir Benfro)

Community: Mathry (Mathri)

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 burial chamber in hedge of field and is formed by a massive capstone measuring, 6m in length, 3.3m wide and is 1m thick; its lies partially on the ground and is partially supported by a fallen side stone which has slumped to one side and stands tilted. The fallen stone has a cross section of 0.6m and is 2.3m long. The area around it does appear to be a slight eminence. Many large boulders lie around the monument, some of which could well be part of it whilst others are doubtless the result of field clearance.

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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