© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Fforest Castle Mound is a medieval motte constructed upon Ashgill bedrock in Wales. The mound rises prominently from geology formed during the Ashgill period, with mudstone, siltstone and sandstone substrata providing a firm foundation for the earthwork. As a motte, the monument represents a characteristic form of Norman or early medieval fortification, consisting of a raised earthen mound that would originally have supported timber or stone defensive structures. The site's bedrock composition of alternating fine sedimentary layers would have influenced both the stability of the mound and the practicalities of its initial construction.
The monument is protected and recorded by Cadw under reference BR131, reflecting its significance within the medieval defensive landscape of Wales. Mottos of this type typically served as administrative and military focal points for their localities, commanding views of surrounding land. The specific geological setting of Fforest Castle Mound—rooted in the ancient mudstones and siltstones of the Ashgill formation—anchors this earthwork within both its medieval historical context and the deeper geological history of the Welsh landscape. The mound survives as a substantial landscape feature, preserving evidence of medieval settlement and control in the region.
Fforest Castle Mound is a scheduled monument protected by Cadw under reference BR131. View the official record →
Fforest Castle Mound is a medieval motte constructed upon Ashgill bedrock in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference BR131.
Fforest 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.
Fforest 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 BR131.
Several scheduled monuments lie within 10 km, including Tynewydd Roman road (1.7 km), Caerau Roman Site (1.9 km), Caerau Castle Mound (1.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Fforest 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.
Fforest Castle Mound stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.