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Tomen Llansantffraid is a medieval motte situated in Wales and protected as a scheduled ancient monument by Cadw. The earthwork rises from bedrock composed of Llandovery rocks—mudstone, siltstone and sandstone formed during the Llandovery period—which would have provided a firm foundation for its construction. The underlying geology of alternating softer and harder strata may have influenced both the mound's stability and the choice of this location for defensive purposes.
As a motte, the monument represents a common form of medieval fortification across Wales and the Anglo-Norman borderlands, typically comprising an artificial or enlarged mound crowned with a timber or stone structure. The substantial earthwork visible today preserves evidence of medieval settlement and territorial control, with the local bedrock geology shaping how erosion and preservation have affected the site over centuries.
The monument's designation under Cadw reference RD142 ensures its protection and long-term management. Such mottes served as administrative and defensive centres during the medieval period, and Tomen Llansantffraid's survival reflects the durability of these earthwork fortifications when constructed on stable geological foundations. The site remains an important record of Wales's medieval landscape and political organisation.
Tomen Llansantffraid is a scheduled monument protected by Cadw under reference RD142. View the official record →
Tomen Llansantffraid is a medieval motte situated in Wales and protected as a scheduled ancient monument by Cadw.
Tomen Llansantffraid 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 Llansantffraid 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 RD142.
Several scheduled monuments lie within 10 km, including Cairns and Standing Stones on Carnau Cefn-y-Ffordd (7.3 km), Carn-y-Geifr (7.4 km), Saith-Maen Standing Stones (7.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Tomen Llansantffraid'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 Llansantffraid stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.