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Y Foelas Castle Mound is a medieval motte and bailey earthwork sited on Llandovery mudstone, siltstone and sandstone bedrock in Wales. The mound rises prominently from this geological foundation, constructed to command the surrounding landscape in the manner typical of Norman and early medieval fortifications. As a motte and bailey, the monument comprises a raised earthen mound—the motte—with an adjoining lower enclosure known as the bailey, designed to provide both residential and defensive functions for a medieval lord and garrison.
The castle's location on Llandovery rocks, formed during the Ordovician and Silurian periods, placed the structure on stable bedrock of clay and sedimentary stone. This geological stability would have been advantageous for the construction and longevity of the earthwork, preventing subsidence and deterioration of the fortification's principal mound. The underlying stone also influenced the landscape's drainage and settlement patterns in the medieval period.
Y Foelas Castle Mound is protected and recorded by Cadw, the Welsh historic monuments authority, under reference DE097. This designation ensures the preservation of the motte and bailey as an important example of medieval defensive architecture in Wales, contributing to understanding of Norman and post-Conquest settlement strategies across the region. The earthwork survives as a substantial landscape feature and archaeological record of medieval military and social organisation.
Y Foelas Castle Mound is a scheduled monument protected by Cadw under reference DE097. View the official record →
Y Foelas Castle Mound is a medieval motte and bailey earthwork sited on Llandovery mudstone, siltstone and sandstone bedrock in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference DE097.
Y Foelas Castle Mound 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.
Y Foelas 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 DE097.
Several scheduled monuments lie within 10 km, including Maes-Gwyn Castle Mound (0.7 km), Pont Newydd (Northern) (1.3 km), Pont Newydd (Southern) (1.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Y Foelas 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.
Y Foelas Castle Mound stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.