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Llys Arthur, Dyffryn-Castell is a medieval moated site situated in Wales and protected as a scheduled monument by Cadw under reference CD023. The site occupies land underlain by Llandovery Rocks, a geological formation of mudstone, siltstone and sandstone deposited during the Llandovery period. This bedrock composition shaped both the drainage characteristics of the site and the materials available for construction.
Moated sites of this type represent a widespread medieval settlement form, typically associated with the 12th to 14th centuries. The moat itself served defensive, drainage and status functions, marking the residence of a person of rank within the feudal hierarchy. The name Llys Arthur suggests an association with a Welsh noble household, and the site's location in the Welsh landscape indicates its role within medieval Welsh territorial organisation.
The survival of Llys Arthur's earthworks reflects the site's abandonment before modern agricultural intensification destroyed similar monuments. The underlying Llandovery geology, whilst potentially challenging for maintaining stable water within the moat, would have provided good drainage for the surrounding fields. Today the monument remains visible as a physical record of medieval settlement patterns and social hierarchy in Wales.
Llys Arthur, Dyffryn-Castell is a scheduled monument protected by Cadw under reference CD023. View the official record →
Llys Arthur, Dyffryn-Castell is a medieval moated site situated in Wales and protected as a scheduled monument by Cadw under reference CD023.
Llys Arthur, Dyffryn-Castell dates from the medieval period, and is classified as a moated site. It is one of over 32,000 scheduled monuments protected across the UK.
Llys Arthur, Dyffryn-Castell 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 CD023.
Several scheduled monuments lie within 10 km, including Banc Erw Barfe Deserted Rural Settlement (5.3 km), Pen y Garn Cairn (5.5 km), Bryn Diliw Long Hut (7.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Llys Arthur, Dyffryn-Castell'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.
Llys Arthur, Dyffryn-Castell stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.