Pilleth/Castell Foel-allt
Pilleth, or Bryn Glas as it is sometimes called, is a remote and profoundly atmospheric site in the upper Lugg valley of Radnorshire, mid-Wales, best known as the location of one of the most significant and dramatic battles of the medieval period in Wales. The site is associated with Castell Foel-allt, a small earthwork fortification on the hillside above the valley, but it is the Battle of Bryn Glas, fought here on 22 June 1402, that defines the place's historical gravity. This was the engagement in which Owain Glyndŵr's Welsh forces decisively defeated an English army under Sir Edmund Mortimer, capturing Mortimer himself and killing perhaps a thousand or more of his men. It was a turning point in Glyndŵr's great uprising against English rule and remains one of the most consequential battles ever fought on Welsh soil.
The battle itself unfolded when Mortimer led a Herefordshire force westward to suppress Glyndŵr's rebellion, only to be lured into a catastrophic ambush on the hillside of Bryn Glas. Glyndŵr's men held the high ground, and crucially, Welsh archers who had been serving within Mortimer's own ranks switched sides during the fighting, turning their bows against the English troops. The slaughter was severe. Contemporary and near-contemporary chronicles — including those used by Shakespeare, who references the battle in Henry IV Part 1 — speak of Welsh women mutilating the English dead on the battlefield, a detail that lodged itself in the historical memory of both nations. Mortimer, rather than being ransomed quickly as protocol demanded, was instead held by Glyndŵr and ultimately became his son-in-law, a union that drew him into the wider web of rebellion against Henry IV.
Castell Foel-allt itself is a modest earthwork, the remnants of a motte or ringwork fortification sitting above the valley, typical of the small Norman-period castles scattered across the Welsh Marches as English lords sought to hold territory against Welsh resistance. The castle is not spectacular in the manner of great stone fortresses, and much of its structure has long since returned to the hillside, but its presence underscores the contested, militarised nature of this border landscape across many centuries. The site commands a meaningful view over the Lugg valley and the surrounding hills, and standing there it is easy to understand why the location held strategic value for whoever controlled it.
Physically, Pilleth is an exceptionally quiet and lonely place. The hamlet consists of little more than the ancient Church of Our Lady of Pilleth, a handful of scattered farms, and the open hillside climbing steeply above. The church, dedicated to Our Lady and dating substantially from the medieval period, sits at the foot of the slope and is itself a place of considerable interest, containing an ancient well once associated with pilgrimage and a celebrated wooden statue of the Virgin that was reputedly venerated here for centuries. A row of Wellingtonia (giant sequoia) trees planted on the battlefield slope in the Victorian era to mark where the dead were buried stands as a mournful and unusual memorial, their great dark forms visible from the lane below and immediately striking against the open hillside. The sounds here are almost entirely natural — wind moving through the trees on the ridge, the occasional cry of a red kite overhead, the distant sound of sheep.
The surrounding landscape belongs to the Radnorshire hills, a deeply rural and underpopulated stretch of mid-Wales that sees relatively few visitors compared to the Brecon Beacons to the south or Snowdonia to the north. The River Lugg runs through the valley bottom, and the hills rise on all sides with a soft, rounded character covered in rough pasture and bracken. The market town of Knighton lies roughly five miles to the north and serves as the nearest settlement of any size, sitting on the Offa's Dyke Path long-distance walking route. Presteigne, the old county town of Radnorshire, is a similar distance to the southeast and well worth visiting. The entire region has a feeling of extraordinary remoteness and timelessness that is rare in modern Britain.
Getting to Pilleth requires a car in almost all practical circumstances, as public transport does not reach this valley. The site lies off a narrow country lane running through the Lugg valley between Knighton and Presteigne, and the approach involves single-track roads with passing places. The church is normally accessible to visitors and acts as the principal focal point of a visit; the battlefield hillside above can be viewed from the lane and the churchyard, and the Wellingtonia trees on the slope provide a clear visual anchor for the site of the fighting. There is no formal visitor infrastructure — no car park, no interpretive panels of any scale, and no entry fee. Visitors should wear appropriate footwear if they intend to walk up toward the earthwork, as the ground can be wet and the slope is steep in places. The site is best visited in drier months, broadly spring through early autumn, though the bleakness of the valley in winter has its own austere appeal.
Among the lesser-known details of Pilleth is the long history of the church as a place of Marian pilgrimage before the Reformation, which gave this remote spot a significance in medieval religious life disproportionate to its size. The holy well in the churchyard retains a quiet mystique. The Victorian Wellingtonia trees, planted around 1848 by the local landowner, represent an early and earnest attempt to memorialise a battle that had been largely forgotten in the centuries following the collapse of Glyndŵr's rebellion, and they give the hillside an arresting, slightly surreal character unlike any other battlefield memorial in Wales. The Battle of Bryn Glas and the capture of Mortimer were significant enough that Shakespeare incorporated them into his history plays, meaning this quiet Welsh hillside has a traceable literary legacy reaching forward to the Globe Theatre and beyond. For those interested in the history of Wales, the Glyndŵr uprising, or the contested borderlands of the Marches, Pilleth is a place of exceptional resonance.