Ancient Monuments

History on the Ground

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

Offa's Dyke: Section extending 2143m south from The Firs, Rhos-y-Meirch

A Scheduled Monument in Presteigne (Llanandras), Powys

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: 52.3099 / 52°18'35"N

Longitude: -3.0509 / 3°3'3"W

OS Eastings: 328446

OS Northings: 268501

OS Grid: SO284685

Mapcode National: GBR B4.WMJJ

Mapcode Global: VH76W.26FJ

Entry Name: Offa's Dyke: Section extending 2143m S from The Firs, Rhos-y-Meirch

Scheduled Date:

Source: Cadw

Source ID: 1910

Cadw Legacy ID: RD019

Schedule Class: Monument

Category: Linear earthwork

Period: Early Medieval

County: Powys

Community: Presteigne (Llanandras)

Traditional County: Radnorshire


The monument consists of a linear earthwork, a substantial bank and ditch forming a major boundary between two adjacent landholdings. It runs roughly along the border between modern England and Wales. It is traditionally thought to have been built by the Mercian King Offa in the later 8th century, but recent excavations on a section near Chirk suggest that work may have begun at least two centuries earlier than this. The remains included in this stretch consist for the most part of a bank standing about 1m high. For most of the stretch, it runs along a line with good views to the west and a gentle slope in that direction. The slope makes a western ditch unnecessary, and one is only clearly visible for 400m or so towards the northern end of the stretch, though there are hints elsewhere. There are however, a number of points, particularly towards the northern end and around SO 2870 6815, where there are clear traces of an eastern ditch, suggesting that the bank was constructed by moving the quarried material downhill, a more efficient technique on this terrain.

The monument is of national importance for its potential to enhance our knowledge of early medieval defensive organisation and settlement. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The remains form part of the record of the line of the earthwork, and their importance is 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.