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Caer Lletty-Llwyd is a prehistoric hillfort located in Wales and protected as an Ancient Monument by Cadw under reference CD101. The site occupies high ground underlain by Llandovery Rocks, a bedrock formation of mudstone, siltstone and sandstone that provides a naturally defensible position. This geology typical of the Ordovician period would have offered both practical challenges and advantages to its prehistoric builders.
The hillfort follows the conventional Iron Age pattern of a fortified settlement commanding the surrounding landscape. Its defensive earthworks—comprising ramparts and ditches—exploit the natural topography of the bedrock foundation. The mixed sedimentary geology of the site would have influenced both construction methods and the availability of materials for building and maintenance of the fortifications.
Caer Lletty-Llwyd represents an important monument of Wales's Iron Age heritage, preserving evidence of prehistoric settlement and territorial control. The site remains a significant archaeological record, protected to ensure its preservation for future study and as a monument to the region's early history. Its strategic position and surviving earthworks continue to demonstrate the sophistication of prehistoric Welsh defensive architecture.
Caer Lletty-Llwyd is a scheduled monument protected by Cadw under reference CD101. View the official record →
Caer Lletty-Llwyd is a prehistoric hillfort located in Wales and protected as an Ancient Monument by Cadw under reference CD101.
Caer Lletty-Llwyd dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across the UK.
Caer Lletty-Llwyd 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 CD101.
Several scheduled monuments lie within 10 km, including Bronfloyd Leadmine (5 km), Round Barrow & Standing Stone 700m W of Plas Gogerddan (5.4 km), Castell Gwar-Cwm (5.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Caer Lletty-Llwyd'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.
Caer Lletty-Llwyd stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.