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Caerau Gaer is a prehistoric defensive enclosure located in Wales, protected as a scheduled monument by Cadw under reference PE176. The site occupies ground underlain by Ashgill Rocks, a geological formation comprising mudstone, siltstone and sandstone deposited during the Ashgill period. This mixed bedrock would have presented considerable challenges to those constructing the enclosure's defences, requiring extraction and working of stone across varying strata to create the characteristic banks and ditches typical of Iron Age and earlier fortified settlements in Wales.
The monument's defensive purpose is evident in its structural design, comprising multiple lines of earthwork intended to control access and provide protection to its inhabitants. The specific topography and geology of the Caerau Gaer location shaped both the construction methods and effectiveness of these defences. Such enclosures served as settlements for communities managing agricultural land and stock across the Welsh landscape, occupying strategically chosen positions that offered natural advantages whilst remaining workable with the tools and labour available to prehistoric populations.
Caerau Gaer is a scheduled monument protected by Cadw under reference PE176. View the official record →
Caerau Gaer is a prehistoric defensive enclosure located in Wales, protected as a scheduled monument by Cadw under reference PE176.
Caerau Gaer dates from the prehistoric period, and is classified as a enclosure - defensive. It is one of over 32,000 scheduled monuments protected across the UK.
Caerau 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 PE176.
Several scheduled monuments lie within 10 km, including Castell Meherin Camps (4.5 km), New House Round Barrows (5 km), Sentence Castle Mound (5.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Caerau 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.
Caerau Gaer stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.