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Mynydd Rhyd Ddu Enclosure is a prehistoric hillfort situated in Wales and protected as an ancient monument by Cadw under reference DE252. The site occupies elevated ground underlain by Wenlock Rocks, a geological formation of interbedded sandstone and conglomerate dating to the Wenlock period. This solid bedrock foundation would have presented significant challenges for the construction of defensive earthworks, which likely relied upon surface stone and soil to form ramparts and ditches characteristic of hillforts of the Iron Age and earlier periods.
The enclosure represents a settlement strategy typical of upland Wales, where communities selected defensible hilltop locations to provide commanding views across surrounding terrain. The nature of the local geology—exposures of hard sandstone and conglomerate—would have influenced both the construction techniques available to the builders and the appearance of the finished fortification.
As a protected site under Cadw's stewardship, Mynydd Rhyd Ddu Enclosure remains an important archaeological resource for understanding prehistoric settlement patterns and defensive architecture in the Welsh landscape. The monument preserves evidence of early land use on terrain where bedrock geology continues to shape the visible character of the site today.
Mynydd Rhyd Ddu Enclosure is a scheduled monument protected by Cadw under reference DE252. View the official record →
Mynydd Rhyd Ddu Enclosure is a prehistoric hillfort situated in Wales and protected as an ancient monument by Cadw under reference DE252.
Mynydd Rhyd Ddu Enclosure dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across the UK.
Mynydd Rhyd Ddu Enclosure 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 DE252.
Several scheduled monuments lie within 10 km, including Corwen Churchyard Cross (5 km), Llangar Old Church (5.4 km), Gwerclas Mound (5.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Mynydd Rhyd Ddu Enclosure'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.
Mynydd Rhyd Ddu Enclosure stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is sandstone and conglomerate, interbedded.