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Pen Castell is a medieval motte situated in Wales, with its earthwork constructed upon bedrock of Ashgill age mudstone, siltstone and sandstone. The motte rises from a landscape shaped by these relatively soft sedimentary rocks, typical of this geological period. The monument is protected and scheduled as a monument in care by Cadw, the Welsh Historic Monuments service, under reference CM080.
The motte represents a common form of early medieval fortification across Wales and the Welsh Marches, built to establish and maintain authority over surrounding territory. Its position on the Ashgill Rocks would have provided a stable base, whilst the underlying mudstone and siltstone allowed for the construction of the substantial earthwork that characterises this monument type.
Such mottes typically served as defensive strongholds and administrative centres for their lords, often sited at strategic points within the landscape. The preservation of Pen Castell as a scheduled monument reflects its importance to understanding medieval settlement, military strategy and the exercise of power in Wales during this formative period.
Pen Castell is a scheduled monument protected by Cadw under reference CM080. View the official record →
Pen Castell is a medieval motte situated in Wales, with its earthwork constructed upon bedrock of Ashgill age mudstone, siltstone and sandstone. It is designated a Scheduled Ancient Monument by Cadw under reference CM080.
Pen Castell dates from the medieval period, and is classified as a motte. It is one of over 32,000 scheduled monuments protected across the UK.
Pen Castell 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 CM080.
Several scheduled monuments lie within 10 km, including Crug Bach Round Barrow (4.4 km), Crug Glas Round Barrow (4.6 km), Gilfach-Fach Round Barrow (5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Pen Castell'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.
Pen Castell stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.