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Henfeddau Fawr Defended Enclosure is a prehistoric earthwork monument situated in Wales and protected by Cadw as a scheduled ancient monument. The enclosure consists of defensive banks and ditches that once enclosed a settlement on land underlain by Ashgill rocks—a sequence of mudstone, siltstone and sandstone formed during the Ashgill geological period. The geology provided a firm but workable foundation for the construction of substantial earthworks, which would have required considerable labour to excavate and heap into defensive ramparts. Such defended enclosures are characteristic of the Iron Age and Late Bronze Age in Britain, serving as strongholds for communities and their livestock during periods of increased territorial competition.
The monument's name, Henfeddau Fawr, reflects its Welsh heritage, with "hen" denoting antiquity and "fawr" meaning great or large. The enclosure's defensive design—marked by multiple banks and ditches—indicates its primary function was to provide protection and control access to the interior settlement. The preserved earthwork remains an important archaeological record of Iron Age settlement patterns and community organisation in Wales, offering insight into how prehistoric populations adapted their landscape for both habitation and defence.
Henfeddau Fawr Defended Enclosure is a scheduled monument protected by Cadw under reference PE561. View the official record →
Henfeddau Fawr Defended Enclosure is a prehistoric earthwork monument situated in Wales and protected by Cadw as a scheduled ancient monument.
Henfeddau Fawr Defended Enclosure 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.
Henfeddau Fawr Defended Enclosure 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 PE561.
Several scheduled monuments lie within 10 km, including Castell Bach (4 km), Castell Mawr Mound and Bailey Castle (4.2 km), Capel Bettws (4.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Henfeddau Fawr Defended Enclosure'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.
Henfeddau Fawr Defended Enclosure stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.