Simon's Castle
Simon's Castle is an ancient earthwork fortification located in the rural heartland of mid-Wales, near the village of Llanrhaeadr-ym-Mochnant in Powys. The site consists of the remains of a motte-and-bailey castle, a form of Norman military architecture that was widely introduced across Wales following the conquest period of the eleventh and twelfth centuries. Though modest in its present-day appearance compared to the grand stone fortresses that dominate Welsh heritage tourism, Simon's Castle holds genuine historical significance as evidence of the layered and often turbulent process by which Norman and Marcher lords sought to extend their control into the Welsh uplands. For those with an interest in early medieval history, earthwork archaeology, or simply the quieter, less-visited corners of the Welsh countryside, the site offers a rewarding and contemplative experience.
The origins of Simon's Castle are rooted in the Norman period, when the English Crown and its allied Marcher lords constructed a network of castles — many of them earthwork mottes — to consolidate territorial gains and project military power into the Welsh interior. The name "Simon's Castle" likely refers to a Norman lord or castellan named Simon who held the site, though detailed documentary evidence about this individual is scarce, which is not unusual for smaller motte fortifications of this era. The castle would have served as an administrative and defensive centre for a local lordship, commanding the surrounding landscape and providing a fortified residence for its garrison. The broader region around Llanrhaeadr-ym-Mochnant saw repeated conflict between Welsh princes and Norman lords throughout the medieval period, and a fortification at this location would have been part of that contested frontier landscape.
In its physical character today, Simon's Castle presents itself as an earthwork motte — essentially an artificial mound of earth upon which a timber or later stone tower would once have stood — along with traces of the associated bailey enclosure. The mound itself rises noticeably above the surrounding terrain, its form softened by centuries of grass growth and natural weathering, giving it the rounded, organic quality common to surviving mottes across Wales and the Marches. Visitors standing atop the motte are rewarded with an elevated vantage point over the valley and hills, much as the original occupants would have used it for surveillance and signal. The atmosphere is one of quiet solitude, with birdsong and the sound of wind across the grass the dominant sensory experience, underlining just how remote and peaceful this corner of mid-Wales remains.
The surrounding landscape is quintessentially mid-Welsh in character — rolling green hills, deep valleys carved by rivers and streams, hedgerows and scattered farmsteads, with the Berwyn Mountains providing a dramatic upland backdrop to the east. The village of Llanrhaeadr-ym-Mochnant itself is a notable local centre, best known as the home of William Morgan, the scholar who translated the Bible into Welsh in the sixteenth century, a landmark event in the preservation of the Welsh language. Very close to the village is Pistyll Rhaeadr, one of the highest waterfalls in Wales and one of the Seven Wonders of Wales, making this entire area rich in both natural and cultural heritage. The River Rhaeadr flows through the valley, and the landscape is notably green and lush even by Welsh standards.
For those wishing to visit Simon's Castle, the site is most easily reached by private vehicle given the limited public transport in this part of Powys. Llanrhaeadr-ym-Mochnant is accessible via the B4580 road, and the castle earthworks lie in the agricultural landscape near the village. As with many earthwork castle sites in Wales, access may cross or adjoin farmland, so visitors should observe the Countryside Code, follow any waymarked paths, and be considerate of working agricultural land. The site is not a managed heritage attraction with facilities such as car parks, interpretation panels, or toilets, so visitors should come prepared and self-sufficient. The best time to visit is during late spring, summer, or early autumn, when the days are long, the paths are drier underfoot, and the landscape is at its most verdant and accessible.
One of the more intriguing aspects of Simon's Castle is precisely its anonymity — the relative obscurity of the person for whom it is named and the absence of dramatic recorded battles or famous sieges associated with it speak to the reality of medieval castle-building, in which dozens of minor fortifications were erected across the landscape to serve local administrative needs rather than to feature in grand historical narratives. These quieter earthwork sites, scattered across Wales and the Marches, collectively tell a story about occupation, resistance, and the gradual transformation of a landscape over centuries that is every bit as compelling as the headline fortresses. For anyone willing to step off the well-worn tourist trail, Simon's Castle and its surroundings offer a genuinely authentic encounter with the deep past of Welsh border country.