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Cae Castell is a medieval earthwork located in Wales and protected by Cadw under reference GM439. The site sits upon bedrock of the South Wales Upper Coal Measures Formation, a Westphalian-age deposit comprising mudstone, siltstone, sandstone, coal, ironstone and ferricrete. This geological foundation would have presented particular challenges and opportunities to medieval builders, as the ironstone-rich substrate is naturally hard and the ferricrete layers provide additional stability, whilst coal deposits nearby indicate the mineral wealth of the locality. The earthwork remains unclassified within the standard typology of medieval defensive or domestic monuments, reflecting either its uncertain functional interpretation or unusual morphological characteristics that defy straightforward categorisation. The monument's survival on this coalfield landscape, where extensive industrial exploitation would later transform the terrain, makes it a significant record of the pre-industrial medieval use of this area.
Cae Castell (Rhyndwyclydach Medieval Earthwork) is a scheduled monument protected by Cadw under reference GM439. View the official record →
Cae Castell is a medieval earthwork located in Wales and protected by Cadw under reference GM439.
Cae Castell (Rhyndwyclydach Medieval Earthwork) dates from the medieval period, and is classified as a earthwork (unclassified). It is one of over 32,000 scheduled monuments protected across the UK.
Cae Castell (Rhyndwyclydach Medieval Earthwork) 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 GM439.
Several scheduled monuments lie within 10 km, including Court Herbert Cross & Grave Slab (8.5 km), Tennant Canal: Skewen Cutting and tramroad bridge (8.5 km), Neath Abbey (8.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Cae Castell (Rhyndwyclydach Medieval Earthwork)'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.
Cae Castell (Rhyndwyclydach Medieval Earthwork) stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.