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Picton Castle Mound is a medieval motte located in Wales and protected by Cadw under reference PE277. The earthwork rises from bedrock of the Millstone Grit Group, a Namurian formation of mudstone, siltstone and sandstone that provided a stable geological foundation for Norman or early medieval fortification. This distinctive geology shaped both the construction and endurance of the defensive work.
The motte represents a characteristic form of military architecture deployed across Wales and the Marches following the Norman conquest. Such mottes typically comprised a substantial earthen mound topped by timber palisades and a keep, surrounded by a bailey or open court protected by further defences. The height and steepness of the mound itself formed a primary defensive feature, exploiting the terrain to command surrounding land.
The Millstone Grit substrate at Picton Castle would have influenced the practicalities of construction, affecting drainage and the stability of the steep slopes required for an effective motte. The durability of the site as a recognisable earthwork reflects both the substantial initial engineering effort invested and the stable conditions provided by the underlying geology, allowing the monument to survive as a significant landscape feature into the present day.
Picton Castle Mound is a scheduled monument protected by Cadw under reference PE277. View the official record →
Picton Castle Mound is a medieval motte located in Wales and protected by Cadw under reference PE277.
Picton 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.
Picton 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 PE277.
Several scheduled monuments lie within 10 km, including Cresswell Castle 100m W of Cresswell Quay (7.3 km), Cresswell Quay (7.6 km), Defended Enclosure 800m NNE of Upton Farm (8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Picton 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.
Picton Castle Mound stands on Millstone Grit Group [See Also Migr], bedrock that formed in the Namurian. The rock here is mudstone, siltstone and sandstone.