Ancient Monuments

History on the Ground

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Werthyr standing stone

A Scheduled Monument in Amlwch, Isle of Anglesey (Ynys Môn)

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Latitude: 53.4087 / 53°24'31"N

Longitude: -4.3856 / 4°23'8"W

OS Eastings: 241522

OS Northings: 392866

OS Grid: SH415928

Mapcode National: GBR HMJP.KW3

Mapcode Global: WH420.LLT4

Entry Name: Werthyr standing stone

Scheduled Date: 4 February 2005

Source: Cadw

Source ID: 4172

Cadw Legacy ID: AN150

Schedule Class: Religious, Ritual and Funerary

Category: Standing stone

Period: Prehistoric

County: Isle of Anglesey (Ynys Môn)

Community: Amlwch

Traditional County: Anglesey


The monument comprises a massive standing stone, probably dating to the Bronze Age (c.2300 BC - 800 BC) and situated within enclosed pasture about 200m to the NE of Werthyr Farm. The standing stone measures about 3m in height, 1.8m in thickness from NE to SW by 0.8m in width. Several packing stones are visible around its base.

The monument is of national importance for its potential to enhance our knowledge of prehistoric ritual practices. The monument is well preserved and is an important relic of a prehistoric funerary and ritual landscape. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits.

The area to be scheduled comprises the remains described and an area around them within which related evidence may be expected to survive. It is circular and measures 6m in diameter.

Source: Cadw

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