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Wentloog Castle is a medieval motte located in Wales and protected by Cadw under reference MM131. The mound rises from bedrock of Lower Devonian age, composed of mudstone, siltstone and sandstone that formed during the Early Devonian period. These ancient rocks provide a solid foundation for the earthwork, which would have been built to command the landscape and provide defensive advantage in the medieval period.
The castle's motte represents a widespread form of Norman or post-Conquest fortification, in which a large artificial or adapted mound served as the platform for a timber or stone tower and palisade. From its elevated position, the castle would have exercised control over surrounding territories and trade routes. The mound itself remains the principal surviving feature of the site, its form still legible in the modern landscape.
Wentloog Castle stands as evidence of medieval military architecture in Wales, reflecting the period when such fortified sites were essential to territorial control and settlement. The durability of the underlying Devonian geology has helped preserve the earthwork through the centuries, allowing the motte's original proportions and strategic positioning to remain visible today. The site contributes significantly to understanding the castle-building strategies deployed across medieval Wales.
Wentloog Castle is a scheduled monument protected by Cadw under reference MM131. View the official record →
Wentloog Castle is a medieval motte located in Wales and protected by Cadw under reference MM131.
Wentloog Castle dates from the medieval period, and is classified as a motte. It is one of over 32,000 scheduled monuments protected across the UK.
Wentloog Castle 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 MM131.
Several scheduled monuments lie within 10 km, including Druidstone Standing Stone (1 km), St. Mary's Churchyard Cross, Marshfield (1.4 km), Pen-y-Lan Camp (1.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Wentloog Castle'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.
Wentloog Castle stands on Lower Devonian Rocks (Undifferentiated), bedrock that formed in the Early Devonian. The rock here is mudstone, siltstone and sandstone.