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Pen Clawdd-Mawr Defended Enclosure is a prehistoric promontory fort situated in Wales, protected as a scheduled monument under Cadw reference CD262. The site exploits a natural rocky outcrop, with defences constructed to command the landscape from an elevated position. The underlying bedrock comprises Llandovery rocks of undifferentiated mudstone, siltstone and sandstone, formed during the Llandovery period and providing the natural stone foundation upon which the fort's ramparts were built.
The enclosure represents a type of Iron Age settlement strategy, where naturally defensible promontories were selected and enhanced with artificial barriers. The fort's location inland, rather than coastal, suggests its primary function was territorial control and protection of settlement and resources rather than maritime defence. The geology of the site—fractured and exposed Llandovery strata—would have provided both ready building material and natural obstacles to attackers.
Today the monument preserves evidence of prehistoric settlement patterns and defensive engineering techniques. The promontory's elevated position and rocky foundation remain substantially intact, allowing visitors to appreciate both the natural advantages exploited by its Iron Age builders and the scale of labour involved in constructing barriers across such challenging terrain.
Pen Clawdd-Mawr Defended Enclosure is a scheduled monument protected by Cadw under reference CD262. View the official record →
Pen Clawdd-Mawr Defended Enclosure is a prehistoric promontory fort situated in Wales, protected as a scheduled monument under Cadw reference CD262.
Pen Clawdd-Mawr Defended Enclosure dates from the prehistoric period, and is classified as a promontory fort - inland. It is one of over 32,000 scheduled monuments protected across the UK.
Pen Clawdd-Mawr Defended 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 CD262.
Several scheduled monuments lie within 10 km, including Castell Cwmere (2.4 km), Cribyn Clottas (4.3 km), Sculptured Stone in Church (4.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Pen Clawdd-Mawr Defended 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.
Pen Clawdd-Mawr Defended Enclosure stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.