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Sentence Castle Mound is a medieval motte situated on bedrock of Pridoli mudstone, siltstone and sandstone in Wales. The mound rises prominently from its natural geological foundation, a typical earthwork fortification of the Norman period designed to command the surrounding landscape. Such structures served as the stronghold of local lords, with the raised platform originally supporting a timber or stone tower that provided both defensive advantage and a visible symbol of authority over the surrounding territory.
The monument's construction exploited the local topography and underlying Pridoli rocks to create its defensive position. The mudstone and siltstone bedrock would have provided firm ground for the substantial earthwork, whilst the varied geology of the site influenced both its suitability for fortification and the labour required for its creation. The mound represents a significant element of the medieval settlement pattern and lordly control across the Welsh landscape.
The site is now protected by Cadw, the Welsh Historic Monuments service, under the reference PE110, ensuring its preservation as an important record of Norman military architecture and medieval Welsh-border administration.
Sentence Castle Mound is a scheduled monument protected by Cadw under reference PE110. View the official record →
Sentence Castle Mound is a medieval motte situated on bedrock of Pridoli mudstone, siltstone and sandstone in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference PE110.
Sentence 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.
Sentence 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 PE110.
Several scheduled monuments lie within 10 km, including Stepaside/Kilgetty Ironworks (5.2 km), Underhill Wood Primitive Coal Workings (5.3 km), Grove Colliery (5.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Sentence 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.
Sentence Castle Mound stands on Pridoli Rocks (Undifferentiated), bedrock that formed in the Pridoli. The rock here is mudstone, siltstone and sandstone.