Ancient Monuments

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Rhiw Burial Chambers

A Scheduled Monument in Aberdaron, Gwynedd

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Latitude: 52.8276 / 52°49'39"N

Longitude: -4.6171 / 4°37'1"W

OS Eastings: 223776

OS Northings: 328773

OS Grid: SH237287

Mapcode National: GBR 52.TT23

Mapcode Global: WH44T.16N4

Entry Name: Rhiw Burial Chambers

Scheduled Date:

Source: Cadw

Source ID: 3159

Cadw Legacy ID: CN026

Schedule Class: Religious, Ritual and Funerary

Category: Chambered long cairn

Period: Prehistoric

County: Gwynedd

Community: Aberdaron

Traditional County: Caernarfonshire


The monument consists of the remains of a chambered long cairn, dating to early Neolithic (c. 4,200BC - 3,000BC). A long cairn is a roughly rectangular or trapezoidal mound of stone, usually between 25m and 120m long, with a length exceeding twice its greatest width. The mound may be edged with a timber or stone revetment, and they contain one or more stone or wooden burial chambers.

The site consists of two burial chambers and the remains of a long cairn, all of which have been built into a modern field wall. The larger chamber, to the northwest, is no longer connected to the cairn remains, although the field wall does link the two. The capstone of this chamber measures 3.95m in length and 3.35m width; it is supported at its northwest end by three portal stones which are c. 1.37m in height and at its southeast end by a single stone 0.75m in height. The three portal stones are built into a field bank, which crosses the front of the chamber. The smaller chamber sits at the head of the cairn remains, and has a capstone which measures 2.7m in length and 1.7m width which partially rests on two low upright stones that are 0.75m in height, the south eastern end rests on the ground. The cairn is about 27m in length, 6m wide and just over 1m in height and is composed of loose stone; it is incorporated into the field wall on its north eastern edge. At the southeast of the mound is a single upright slab just visible in the cairn material.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. The features are an important relic of a prehistoric funerary and ritual landscape and retain significant environmental and structural evidence. Chambered long cairns 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.

Source: Cadw

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