Ancient Monuments

History on the Ground

This site is entirely user-supported. See how you can help.

Maen Llwyd in Glynllifon

A Scheduled Monument in Clynnog, Gwynedd

We don't have any photos of this monument yet. Why don't you be the first to send us one?

Upload Photo »

Approximate Location Map
Large Map »

If Google Street View is available, the image is from the best available vantage point looking, if possible, towards the location of the monument. Where it is not available, the satellite view is shown instead.


Latitude: 53.0619 / 53°3'42"N

Longitude: -4.322 / 4°19'19"W

OS Eastings: 244495

OS Northings: 354152

OS Grid: SH444541

Mapcode National: GBR 5G.C0L7

Mapcode Global: WH43S.L93H

Entry Name: Maen Llwyd in Glynllifon

Scheduled Date:

Source: Cadw

Source ID: 3484

Cadw Legacy ID: CN143

Schedule Class: Religious, Ritual and Funerary

Category: Standing stone

Period: Prehistoric

County: Gwynedd

Community: Clynnog

Traditional County: Caernarfonshire


The monument comprises a large standing stone, which probably dates to the Bronze Age (c. 2300 - 800 BC). It measures 2.9 m high; the base is roughly of four sides, the north and east sides being 1.2 m wide, the west side 0.9 m wide and the south side 0.65 m wide. There are strong striated lines down the north face, and also seven small slots 0.30 m long, 0.75 - 1cm wide and 2.0 cm deep. They run diagonally down the face of the stone, covering a spread of 0.34 m. The stone stands in parkland, which was once part of the Glynllifon estate.

An excavation in 1875 on the E side of the stone found evidence of a cremation and fragments of an urn, probably of Early Bronze Age date. Further excavations in 1931 yielded some pieces of quartz, charcoal and a few small packing stones.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. It is an important relic of a prehistoric funerary and ritual landscape and retains significant archaeological potential. There is a strong probability of the presence of intact burial or ritual deposits, together with environmental and structural evidence. Standing stones are often part of a larger cluster of monuments and their importance can be 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

Other nearby scheduled monuments is an independent online resource and is not associated with any government department. All government data published here is used under licence. Please do not contact for any queries related to any individual ancient or schedued monument, planning permission related to scheduled monuments or the scheduling process itself. is a Good Stuff website.