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Tomen Llanio is a medieval motte located in Wales and protected by Cadw under reference CD022. The earthwork rises from bedrock formed of Llandovery rocks—undifferentiated mudstone, siltstone and sandstone laid down during the Llandovery period—which provided a naturally stable foundation for its construction. This geology is characteristic of the region and would have influenced both the feasibility and technique of mound building at this location.
The motte represents the defensive and administrative centre of a Norman or post-Conquest Welsh lordship. The raised earthwork is typical of medieval military architecture in Wales, where such mounds served as platforms for timber or stone fortifications commanding the surrounding landscape. Mottes of this form were often the focal points of larger manorial complexes.
Today, Tomen Llanio survives as an earthwork monument, its form legible in the Welsh landscape as evidence of medieval territorial organisation and lordly power. The protection afforded by Cadw recognises its archaeological and historical significance as a surviving example of medieval fortification strategy in Wales, preserving an important record of the period's settlement and social hierarchy.
Tomen Llanio is a scheduled monument protected by Cadw under reference CD022. View the official record →
Tomen Llanio is a medieval motte located in Wales and protected by Cadw under reference CD022.
Tomen Llanio dates from the medieval period, and is classified as a motte. It is one of over 32,000 scheduled monuments protected across the UK.
Tomen Llanio 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 CD022.
Several scheduled monuments lie within 10 km, including Four Inscribed Stones in Church (2.6 km), Cairns and Ring Works S of Bryn Rhudd (4 km), Crug Round Cairn (4.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Tomen Llanio'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.
Tomen Llanio stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.