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Newcastle Castle is a medieval motte and bailey situated in Wales and protected by Cadw as a scheduled monument under reference MM085. The site rises from bedrock composed of Lower Devonian rocks—mudstone, siltstone and sandstone laid down during the Early Devonian period. These durable geological foundations provided a stable base for the earthwork's construction, typical of motte and bailey fortifications built across Britain and Wales from the late 11th century onwards.
The castle comprises the characteristic two-part defensive structure: a raised motte crowned with a timber or stone stronghold, surrounded by a bailey—a lower, roughly circular enclosure where domestic and military buildings would have been situated. The substantial earthworks remain visible today, their profiles shaped by the underlying geology and the engineering practices of medieval castle builders who exploited natural slopes where possible to maximise defensive advantages.
Newcastle Castle exemplifies the expedient military architecture deployed during the Norman period and its aftermath, when such fortifications served as instruments of territorial control and administration. Though modest in scale compared to masonry castles, the site represents an important phase in Welsh medieval history when motte and bailey castles formed the backbone of frontier defence and settlement consolidation across the principality.
Newcastle Castle is a scheduled monument protected by Cadw under reference MM085. View the official record →
Newcastle Castle is a medieval motte and bailey situated in Wales and protected by Cadw as a scheduled monument under reference MM085.
Newcastle Castle dates from the medieval period, and is classified as a motte and bailey. It is one of over 32,000 scheduled monuments protected across the UK.
Newcastle 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 MM085.
Several scheduled monuments lie within 10 km, including Dingestow Castle (6.9 km), St. Dingad's Churchyard Cross, Dingestow (7 km), Mill Wood Castle Mound (7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Newcastle 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.
Newcastle Castle stands on Lower Devonian Rocks (Undifferentiated), bedrock that formed in the Early Devonian. The rock here is mudstone, siltstone and sandstone.