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Castle Mound 800m NNW of Ty'n-y-Caeau is a medieval motte, a fortification type that spread rapidly through Britain following the Norman Conquest of 1066. The mound rises prominently from the surrounding Welsh landscape, exploiting the local topography to command views across the approaches to the settlement. This earthwork defensive strategy required minimal masonry, relying instead on steep artificial slopes to deter assault.
The mound's foundations rest upon Lower Devonian rocks—mudstone, siltstone and sandstone formed in the Early Devonian period, millions of years before human settlement. The underlying geology would have influenced both the mound's construction and its stability over eight centuries. The site's location relative to Ty'n-y-Caeau reflects the integration of Norman castle-building with existing Welsh communities during the period of conquest and consolidation in medieval Wales.
The motte represents a transitional phase in Welsh military architecture, when Norman lords established control through swift earth and timber fortifications before some were later upgraded with stone. Now preserved by Cadw under reference BR046, the mound survives as an earthwork monument, testament to medieval defensive engineering in the Welsh borderlands.
Castle Mound 800m NNW of Ty'n-y-Caeau is a scheduled monument protected by Cadw under reference BR046. View the official record →
Castle Mound 800m NNW of Ty'n-y-Caeau is a medieval motte, a fortification type that spread rapidly through Britain following the Norman Conquest of 1066. It is designated a Scheduled Ancient Monument by Cadw under reference BR046.
Castle Mound 800m NNW of Ty'n-y-Caeau dates from the medieval period, and is classified as a motte. It is one of over 32,000 scheduled monuments protected across the UK.
Castle Mound 800m NNW of Ty'n-y-Caeau 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 BR046.
Several scheduled monuments lie within 10 km, including Early Medieval Cross in St Brynach’s Church, Llanfrynach (3.7 km), Ty Illtyd Long Barrow (4.2 km), Coed y Caerau Camp (5.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Castle Mound 800m NNW of Ty'n-y-Caeau'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.
Castle Mound 800m NNW of Ty'n-y-Caeau stands on Lower Devonian Rocks (Undifferentiated), bedrock that formed in the Early Devonian. The rock here is mudstone, siltstone and sandstone.