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Lle'r Gaer is a prehistoric hillfort located in Glamorgan, Wales, designated as a scheduled ancient monument under Cadw reference GM219. The site comprises a substantial defensive structure with multiple ramparts and ditches characteristic of Iron Age fortifications, though occupation may have extended into the Romano-British period. Its elevated position on the landscape provided commanding views of the surrounding terrain, typical of hillforts constructed to serve defensive, administrative, or territorial functions during the later prehistoric period. The monument represents an important example of the hillfort tradition in South Wales and contributes to understanding prehistoric settlement patterns and social organisation in the region during the Iron Age.
Lle'r Gaer is a scheduled monument protected by Cadw under reference GM219. View the official record →
Lle'r Gaer is a prehistoric hillfort located in Glamorgan, Wales, designated as a scheduled ancient monument under Cadw reference GM219.
Lle'r Gaer dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across the UK.
Lle'r Gaer 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 GM219.
Several scheduled monuments lie within 10 km, including Llantrisant Castle (3.6 km), Rhiw Saeson Caerau (4.1 km), Cae-yr-Arfau Burial Chamber (5.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Lle'r Gaer'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.
Lle'r Gaer stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.