History in Structure

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Bwrdd y Tri Arglwydd

A Grade II Listed Building in Corwen, Denbighshire

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Latitude: 53.0107 / 53°0'38"N

Longitude: -3.3371 / 3°20'13"W

OS Eastings: 310383

OS Northings: 346773

OS Grid: SJ103467

Mapcode National: GBR 6Q.GCW7

Mapcode Global: WH77V.QL28

Plus Code: 9C5R2M67+74

Entry Name: Bwrdd y Tri Arglwydd

Listing Date: 20 October 1966

Last Amended: 1 February 1995

Grade: II

Source: Cadw

Source ID: 710

Building Class: Civil

Location: At the N of the community, close to the W side of a lane which runs N from the A5104 almost opposite its junction with the B5436 to Carrog: 1km approx. N of this junction, just before another lane ent

County: Denbighshire

Community: Corwen

Community: Corwen

Locality: Carrog

Traditional County: Merionethshire

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The stones are reputed to have their origin in a pre-historic burial chamber, but from the C14 to have been used as boundary marker between the lordships of Rug (although earlier interpretations favoured Ruthin), Yale and Glyndyfrdwy. At one time, the letters, Y, R and G, could be seen inscribed on 3 faces of the stone, but now only the letter R remains visible.


A rough stone base approx. 1 metre high carries a smaller, roughly shaped stone, with the letter R inscribed in its W facing angle. There is an inscription plate in the base, which reads: 'this ancient boundary stone marks the meeting point of four parishes and of the lordships of Ruthin, Glyndyfrdwy and Yale'.

Reasons for Listing

A curious surviving example of a late medieval boundary marker stone.

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