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Castell Blaenllynfi is a medieval castle situated in Breconshire, Wales, occupying a strategically significant location in the upland landscape of the region. The site comprises earthwork remains characteristic of medieval defensive architecture, with evidence suggesting occupation during the medieval period as part of the network of fortifications controlling the Welsh marches. The castle's physical remains include defensive features typical of medieval Welsh and Anglo-Norman frontier castles, reflecting the complex political and military dynamics of the area during the Middle Ages. As a scheduled ancient monument under Cadw's protection, the site preserves important archaeological evidence of medieval settlement and defence in Breconshire.
Castell Blaenllynfi is a scheduled monument protected by Cadw under reference BR009. View the official record →
Castell Blaenllynfi is a medieval castle situated in Breconshire, Wales, occupying a strategically significant location in the upland landscape of the region. It is designated a Scheduled Ancient Monument by Cadw under reference BR009.
Castell Blaenllynfi dates from the medieval period, and is classified as a castle. It is one of over 32,000 scheduled monuments protected across the UK.
Castell Blaenllynfi 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 BR009.
Several scheduled monuments lie within 10 km, including Pant Serthfa round cairn (6.6 km), Clo Cadno platform cairn (7.3 km), Garn Fawr round cairn (8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Castell Blaenllynfi'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.
Castell Blaenllynfi stands on Lower Devonian Rocks (Undifferentiated), bedrock that formed in the Early Devonian. The rock here is mudstone, siltstone and sandstone.