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Dinefwr Park Roman Forts is a Roman military installation situated in Wales on bedrock composed of Llanvirn mudstones, siltstones and sandstones. The underlying geology reflects the ancient seabed of the Whiterock period, now exposed and weathered to form the foundation upon which the forts were constructed. This natural substrate would have presented both challenges and advantages to Roman engineers planning defensive earthworks in the region.
The site comprises multiple phases of Roman military occupation, typical of frontier installations that evolved as strategic needs changed during the Romano-British period. The forts exploited the local topography to establish effective control over the surrounding landscape, with access to water and supply routes being fundamental considerations in their placement. The mudstone and siltstone bedrock, though not ideal for large-scale construction, provided adequate drainage on the sloping terrain.
The monument is now protected by Cadw, the Welsh heritage authority, as a scheduled ancient monument under reference CM367. The surviving earthworks and subsurface deposits preserve evidence of Roman military life, engineering practices and the occupation sequence at this Welsh location. Despite centuries of agricultural use and landscape change, the forts remain an important record of Rome's presence in the western provinces of Britain.
Dinefwr Park Roman Forts is a scheduled monument protected by Cadw under reference CM367. View the official record →
Dinefwr Park Roman Forts is a Roman military installation situated in Wales on bedrock composed of Llanvirn mudstones, siltstones and sandstones. It is designated a Scheduled Ancient Monument by Cadw under reference CM367.
Dinefwr Park Roman Forts dates from the roman period, and is classified as a fort. It is one of over 32,000 scheduled monuments protected across the UK.
Dinefwr Park Roman Forts 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 CM367.
Several scheduled monuments lie within 10 km, including Two Burnt Mounds 600m ESE of Rhyd-y-Ffynnon Farm (3.9 km), Cincoed Limestone Quarries and Kilns (5.3 km), Limekilns East of Cincoed (5.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Dinefwr Park Roman Forts'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.
Dinefwr Park Roman Forts stands on Llanvirn Rocks (Undifferentiated), bedrock that formed in the Whiterock. The rock here is mudstone, siltstone and sandstone.