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Castell Dinas is a prehistoric hillfort situated in Breconshire, Wales, dating to the Iron Age period. The site occupies a prominent hilltop position and is defined by substantial defensive earthworks comprising banks and ditches that encircle the summit, a characteristic feature of Iron Age hillforts across Wales and the broader British Isles. The monument represents an important example of Iron Age settlement and territorial control in the Brecon Beacons region, reflecting the strategic and defensive priorities of prehistoric communities in South Wales. As a scheduled ancient monument under Cadw protection, Castell Dinas remains significant for understanding the settlement patterns and fortification strategies of Iron Age societies in Wales.
Castell Dinas is a scheduled monument protected by Cadw under reference BR015. View the official record →
Castell Dinas is a prehistoric hillfort situated in Breconshire, Wales, dating to the Iron Age period. It is designated a Scheduled Ancient Monument by Cadw under reference BR015.
Castell Dinas dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across the UK.
Castell Dinas 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 BR015.
Several scheduled monuments lie within 10 km, including Standing Stone North of Tretower (8.2 km), Roman Fort at Pen y Gaer (8.2 km), Pen-y-gaer Roman Vicus, Cwmdu (8.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Castell Dinas'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.
Castell Dinas stands on Lower Devonian Rocks (Undifferentiated), bedrock that formed in the Early Devonian. The rock here is mudstone, siltstone and sandstone.