© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Tomen Rhyd-Owen is a medieval motte situated in Wales and protected by Cadw under reference CD076. The mound was constructed on bedrock composed of Ashgill Rocks, an undifferentiated sequence of mudstone, siltstone and sandstone deposited during the Ashgill epoch. This geology would have presented a firm foundation for the earthwork, though the soft sedimentary bedrock required the motte builders to excavate and move substantial quantities of material to achieve the elevated platform characteristic of such fortifications.
The motte represents a form of military architecture widely established across medieval Wales and the borderlands, typically comprising a steep-sided artificial mound, often accompanied by an adjoining bailey. Such structures served as symbols of lordship and territorial control during the medieval period. The solid bedrock beneath Tomen Rhyd-Owen would have provided stability for timber palisades and any stone structures that may have crowned the mound during its period of use.
The monument survives as an earthwork testament to medieval settlement and defence strategies in the Welsh landscape. Its preservation under Cadw's stewardship ensures that this archaeological resource remains available for study and public understanding of medieval fortification practices in Wales.
Tomen Rhyd-Owen is a scheduled monument protected by Cadw under reference CD076. View the official record →
Tomen Rhyd-Owen is a medieval motte situated in Wales and protected by Cadw under reference CD076.
Tomen Rhyd-Owen 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 Rhyd-Owen 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 CD076.
Several scheduled monuments lie within 10 km, including Inscribed Stone & Early Gravestones in St Michael's Church (5 km), Castle Llwyn Bedw (5.2 km), Castell Nonni (7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Tomen Rhyd-Owen'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 Rhyd-Owen stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.