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Ffynnon Allgo is a medieval holy well situated in Wales and protected as a scheduled monument by Cadw under reference AN068. The well lies upon Dinantian bedrock comprising limestone with subordinate sandstone and argillaceous rocks, geology that would have naturally favoured the emergence of spring water and made the site attractive for ritual and medicinal use during the medieval period. The permeable limestone landscape of South Wales has long sustained such springs, and their association with Christian saints and devotional practice became established throughout the medieval Welsh countryside.
Holy wells were focal points of pilgrimage and community life in medieval Wales, often dedicated to local or Celtic saints and believed to possess healing properties. Ffynnon Allgo represents this important tradition of sacred water sources that punctuated the Welsh landscape. The well's name preserves its medieval Welsh heritage, reflecting centuries of spiritual significance within the locality.
The survival of Ffynnon Allgo as a protected monument testifies to the enduring cultural value of these medieval religious sites. Though many such wells fell into disuse following the Reformation, their physical presence and local memory have ensured their recognition as heritage assets worthy of preservation and study.
Ffynnon Allgo is a scheduled monument protected by Cadw under reference AN068. View the official record →
Ffynnon Allgo is a medieval holy well situated in Wales and protected as a scheduled monument by Cadw under reference AN068.
Ffynnon Allgo dates from the medieval period, and is classified as a holy well. It is one of over 32,000 scheduled monuments protected across the UK.
Ffynnon Allgo 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 AN068.
Several scheduled monuments lie within 10 km, including Parciau Dovecote (0.9 km), Pant-y-Saer Burial Chamber (2.6 km), Pant-y-Saer Hut Circles (2.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Ffynnon Allgo'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.
Ffynnon Allgo stands on Dinantian Rocks (Undifferentiated), bedrock that formed in the Mississippian. The rock here is limestone with subordinate sandstone and argillaceous rocks.