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Promontory Fort on Fleming's Down is a prehistoric promontory fort situated in Wales and protected by Cadw under reference GM466. The monument occupies a naturally defensible position on elevated ground, with steep slopes that would have provided substantial protection to its inhabitants. The underlying bedrock comprises Dinantian rocks of limestone with subordinate sandstone and argillaceous layers, formed during the Mississippian period and now weathered to create the distinctive topography that made this location strategically valuable.
Promontory forts of this type were typically constructed during the Iron Age, though some may have earlier origins. They exploited naturally prominent positions by adding defensive earthworks—usually a ditch and bank—across the narrowest point of land to complete the fortification. The steep natural slopes of Fleming's Down would have required minimal additional engineering, making this an efficient use of the landscape's defensive properties.
The site remains largely as an earthwork monument, with its survival dependent on the limestone geology that has resisted erosion. The fort would have served as a settlement and refuge for a community, controlling movement across the surrounding landscape. Such monuments are characteristic of Iron Age settlement patterns in Wales, reflecting both the military and social organisation of prehistoric Welsh communities.
Promontory Fort on Fleming's Down is a scheduled monument protected by Cadw under reference GM466. View the official record →
Promontory Fort on Fleming's Down is a prehistoric promontory fort situated in Wales and protected by Cadw under reference GM466.
Promontory Fort on Fleming's Down dates from the prehistoric period, and is classified as a promontory fort - inland. It is one of over 32,000 scheduled monuments protected across the UK.
Promontory Fort on Fleming's Down 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 GM466.
Several scheduled monuments lie within 10 km, including Cwm Bach Camps (5.4 km), Cwm Nash Defended Enclosure (6.7 km), Tithe Barn, Dovecot & Remains of Other Buildings (6.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Promontory Fort on Fleming's Down'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.
Promontory Fort on Fleming's Down stands on Dinantian Rocks (Undifferentiated), bedrock that formed in the Mississippian. The rock here is limestone with subordinate sandstone and argillaceous rocks.