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Pen-llys Hillfort is a prehistoric fortified settlement located in Wales and protected by Cadw as a scheduled monument under reference MG230. The site occupies ground underlain by Ashgill Rocks, a formation of mudstone, siltstone and sandstone deposited during the Ashgill period of the Ordovician geological era. This bedrock type is characteristic of upland Welsh terrain and would have presented both challenges and advantages to Iron Age communities seeking defensible positions.
The hillfort follows the conventional design of its period, with defensive earthworks positioned to exploit the natural topography of its location. The combination of stone-rich bedrock and sloping terrain typical of such sites afforded opportunities for substantial rampart construction whilst offering commanding views of the surrounding landscape. Such positions were crucial for Iron Age settlement and territorial control.
Today Pen-llys Hillfort remains an important archaeological resource for understanding prehistoric settlement patterns in Wales. Its protection under Cadw recognises its significance as evidence of Iron Age social organisation, defensive strategy and land use. The site contributes to the broader archaeological record of fortified hilltop settlements that characterise this period across Britain.
Pen-llys Hillfort is a scheduled monument protected by Cadw under reference MG230. View the official record →
Pen-llys Hillfort is a prehistoric fortified settlement located in Wales and protected by Cadw as a scheduled monument under reference MG230.
Pen-llys Hillfort dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across the UK.
Pen-llys Hillfort 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 MG230.
Several scheduled monuments lie within 10 km, including Ffridd Mathrafal Hillfort (3.8 km), Bryn y Saethau Hillfort (4.5 km), Mathrafal Castle (5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Pen-llys Hillfort'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.
Pen-llys Hillfort stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.