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Offa's Dyke: Section N & S of Tan-y-Cut is an early medieval linear earthwork forming part of the extensive frontier monument constructed between England and Wales. The dyke follows the commanding ridgeline at this location, exploiting the steep terrain of the underlying Millstone Grit bedrock to enhance its defensive properties. The hard sandstones, siltstones and mudstones of the Namurian period provide a naturally elevated and defensible position that the builders of this monumental work deliberately utilised.
The monument survives as an upstanding earthwork that remains clearly visible across the landscape. Its construction, probably undertaken during the late eighth century, represents one of the most substantial engineering projects of early medieval Britain. The dyke extends for considerable distance across the Wales-England border, and this section at Tan-y-Cut preserves particularly well-defined banks and ditches that demonstrate the consistent monumentality of the work.
The earthwork is protected by Cadw, the historic monuments service of Wales, under the reference DE140. The site's preservation as a scheduled monument ensures that this crucial piece of early medieval frontier history remains available for study and interpretation. The dyke continues to dominate the landscape as it did over twelve centuries ago, providing essential archaeological evidence for understanding the political geography and engineering capabilities of early medieval Britain.
Offa's Dyke: Section N & S of Tan-y-Cut is a scheduled monument protected by Cadw under reference DE140. View the official record →
Offa's Dyke: Section N & S of Tan-y-Cut is an early medieval linear earthwork forming part of the extensive frontier monument constructed between England and Wales. It is designated a Scheduled Ancient Monument by Cadw under reference DE140.
Offa's Dyke: Section N & S of Tan-y-Cut dates from the early medieval period, and is classified as a linear earthwork. It is one of over 32,000 scheduled monuments protected across the UK.
Offa's Dyke: Section N & S of Tan-y-Cut is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is DE140.
Several scheduled monuments lie within 10 km, including Bryn-y-Castell and a section of Wat's Dyke adjacent to Preeshenlle United Reformed Church (7.3 km), Orseddwen cairn (7.9 km), Wat's Dyke: 140m long section, 370m south west of Gobowen Station (8.1 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Offa's Dyke: Section N & S of Tan-y-Cut's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Offa's Dyke: Section N & S of Tan-y-Cut stands on Millstone Grit Group [See Also Migr], bedrock that formed in the Namurian. The rock here is mudstone, siltstone and sandstone.