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Felin Isaf Castle Mound is a medieval motte located in Wales and protected as a scheduled ancient monument under Cadw reference GM370. The mound rises from bedrock of Lower Devonian age, comprising sandstone and conglomerate deposits laid down during the Early Devonian period. This solid geological foundation provided a stable base for the Norman-style earthwork defences that characterise this monument type.
The motte would have formed the dominant strongpoint of a medieval defensive complex, with a raised mound serving as a platform for timber or masonry structures. The interleaving of sandstone and conglomerate beds beneath the site reflects the depositional conditions of an ancient river system, creating variations in ground stability that would have influenced medieval builders' approach to construction and drainage.
As a scheduled monument, Felin Isaf represents an important survival of the medieval military landscape. Such mottes, whether built by marcher lords or established during English campaigns into Welsh territory, are characteristic of 11th- to 13th-century fortification strategy. The monument's protection ensures the preservation of both the earthwork itself and the archaeological evidence it contains of medieval settlement and defence.
Felin Isaf Castle Mound is a scheduled monument protected by Cadw under reference GM370. View the official record →
Felin Isaf Castle Mound is a medieval motte located in Wales and protected as a scheduled ancient monument under Cadw reference GM370.
Felin Isaf Castle Mound dates from the medieval period, and is classified as a motte. It is one of over 32,000 scheduled monuments protected across the UK.
Felin Isaf Castle Mound 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 GM370.
Several scheduled monuments lie within 10 km, including Llanvithyn Camp (7.5 km), Doghill Moated Site, Dyffryn (8 km), St Lythans Chambered Tomb (8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Felin Isaf Castle Mound'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.
Felin Isaf Castle Mound stands on Lower Devonian Rocks (Undifferentiated), bedrock that formed in the Early Devonian. The rock here is sandstone and conglomerate, interbedded.