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Caer Oleu Camp is a prehistoric hillfort situated in Wales and protected by Cadw under reference CN041. The fort occupies a naturally defensible position underlain by Wenlock Rocks, a formation of interbedded sandstone and conglomerate dating to the Wenlock period. This geology provided both a sturdy foundation for the ramparts and ready stone for construction, resources that hill fort builders would have recognised and exploited.
The site represents a form of settlement typical of Iron Age Wales, when hillforts served as centres of power, defence and communal activity across the landscape. The choice of location on Wenlock bedrock reflects the builders' understanding of their local terrain—a hillfort positioned to command views of surrounding land whilst anchored to stable, workable stone.
As a scheduled monument under Cadw's protection, Caer Oleu Camp preserves evidence of prehistoric settlement patterns and defensive architecture. Its survival as an earthwork allows visitors and researchers to understand how Iron Age communities organised their settlement hierarchy and utilised the natural geography of the Welsh countryside for strategic advantage.
Caer Oleu Camp is a scheduled monument protected by Cadw under reference CN041. View the official record →
Caer Oleu Camp is a prehistoric hillfort situated in Wales and protected by Cadw under reference CN041.
Caer Oleu Camp 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 Oleu Camp 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 CN041.
Several scheduled monuments lie within 10 km, including Llanrwst Bridge (5.1 km), Klondyke Lead Mill (5.2 km), Capel Gwydir Uchaf (5.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Caer Oleu Camp'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 Oleu Camp stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is sandstone and conglomerate, interbedded.