Best Castle in Rhondda Cynon Taf, Wales - Map and Reviews

Llantrisant Castle is the site of a medieval Norman motte-and-bailey that once dominated the ridge-top town of Llantrisant. Although the castle is now reduced to a grassy mound and a few indistinct earthworks, it was historically one of the key strongpoints on the eastern edge of the upland Glamorgan March. Its defensive position took full advantage of the steep slopes that fall away on all sides of the hill, offering extensive views across the Vale of Glamorgan and the Taf valley. The first castle here was raised soon after the Norman conquest of Glamorgan, probably in the late eleventh or early twelfth century, as part of the network of timber strongholds established by Robert Fitzhamon and his successors. The original fortification consisted of a large motte, crowned with a timber tower, and an attached bailey enclosure that held service buildings, stores and troop quarters. The castle stood beside the medieval church, as was typical of Norman administrative centres deliberately imposed upon earlier Welsh communities. Llantrisant later became associated with the powerful de Clare lords, and documentary evidence suggests that the motte may have been strengthened or rebuilt in the thirteenth century. This period saw growing friction along the Glamorgan borderlands, and Llantrisant acted as a minor marcher outpost linking the stronger castles at Caerphilly and Cardiff with the chain of upland garrison-points around Tonyrefail, Glynrhondda and the Ogmore valley. The castle’s strategic relevance waned after the Edwardian conquest of Wales in 1282. There is no evidence that a full stone phase was ever constructed, and it appears that the castle fell into disuse relatively early. By the sixteenth century, antiquarian references already describe the remains as “an old castle,” suggesting that the timber structures had collapsed and that any masonry had been robbed away or levelled. A later layer of history lies just below the surface: the site became closely associated with the Llantrisant Freemen, a medieval civic institution whose privileges date back to the era of the castle’s authority. The castle mound became part of the communal identity of the town, even as its physical remains declined. Today the castle survives as a steep, grass-covered motte on the ridge beside the Church of the Three Saints. The ditch and bailey have been largely absorbed into the surrounding townscape, with only faint earthworks visible. Despite its modest remnants, the site is a scheduled ancient monument and an important marker of the Norman restructuring of Glamorgan's upland communities. Alternate names: Llantrisant Castle, Castell Llantrisant, The Castle Mound Llantrisant Castle Llantrisant Castle is the site of a medieval Norman motte-and-bailey that once dominated the ridge-top town of Llantrisant. Although the castle is now reduced to a grassy mound and a few indistinct earthworks, it was historically one of the key strongpoints on the eastern edge of the upland Glamorgan March. Its defensive position took full advantage of the steep slopes that fall away on all sides of the hill, offering extensive views across the Vale of Glamorgan and the Taf valley. The first castle here was raised soon after the Norman conquest of Glamorgan, probably in the late eleventh or early twelfth century, as part of the network of timber strongholds established by Robert Fitzhamon and his successors. The original fortification consisted of a large motte, crowned with a timber tower, and an attached bailey enclosure that held service buildings, stores and troop quarters. The castle stood beside the medieval church, as was typical of Norman administrative centres deliberately imposed upon earlier Welsh communities. Llantrisant later became associated with the powerful de Clare lords, and documentary evidence suggests that the motte may have been strengthened or rebuilt in the thirteenth century. This period saw growing friction along the Glamorgan borderlands, and Llantrisant acted as a minor marcher outpost linking the stronger castles at Caerphilly and Cardiff with the chain of upland garrison-points around Tonyrefail, Glynrhondda and the Ogmore valley. The castle’s strategic relevance waned after the Edwardian conquest of Wales in 1282. There is no evidence that a full stone phase was ever constructed, and it appears that the castle fell into disuse relatively early. By the sixteenth century, antiquarian references already describe the remains as “an old castle,” suggesting that the timber structures had collapsed and that any masonry had been robbed away or levelled. A later layer of history lies just below the surface: the site became closely associated with the Llantrisant Freemen, a medieval civic institution whose privileges date back to the era of the castle’s authority. The castle mound became part of the communal identity of the town, even as its physical remains declined. Today the castle survives as a steep, grass-covered motte on the ridge beside the Church of the Three Saints. The ditch and bailey have been largely absorbed into the surrounding townscape, with only faint earthworks visible. Despite its modest remnants, the site is a scheduled ancient monument and an important marker of the Norman restructuring of Glamorgan's upland communities.

Castell Nos is a medieval motte-and-bailey earthwork positioned on a steep natural pennant sandstone crag above the Rhondda Fach valley, close to the reservoir that now shares its name. The castle occupies a naturally formidable outcrop, which has been artificially scarped to enhance its defensive profile. This combination of natural geology and deliberate shaping creates a dramatic and highly defensible position overlooking the narrow upland valley route. The motte is the primary surviving element. Instead of being an artificial mound, the builders exploited the natural rock, carving and steepening its sides to form a citadel-like platform. The summit is relatively level and large enough to have accommodated a timber tower or fortified lookout structure, likely used to observe movement along the Rhondda–Brecon watershed. The height and sharp scarping of the motte’s sides still give a strong sense of its original power, even though vegetation now softens its edges. Traces of the bailey lie to the northwest, where a slight platform and shallow ditch mark the former enclosure. A more pronounced defensive ditch survives on the northern approach, cut roughly three metres below the motte’s base. The central gap in this ditch is thought to indicate the footings of a medieval drawbridge abutment or timber bridge support. The bailey would have contained timber buildings essential to daily operation, including storage huts, animal pens and workspaces for weapons, tools and supplies. Castell Nos was likely built by the Welsh lords of Meisgyn, descendants of the native ruler Iestyn ap Gwrgant, during the mid thirteenth century. Its construction corresponds to the period following the de Clare expansion into Glyn Rhondda after 1246, when frontier tensions between Welsh upland lords and Norman settlers in Glamorgan were acute. Small but strategically placed fortifications such as Castell Nos helped secure upland routes, protect local communities and assert territorial authority. Its position on the watershed between the Rhondda valleys and Brecon was especially important. The route provided one of the key connections between upland Glamorgan and the interior of Wales, and whoever held Castell Nos controlled movement across this boundary. The steep surrounding slopes and marsh-influenced valley floor would have further restricted access, making the site defensible despite its modest size. Though never developed into a stone castle, Castell Nos remained symbolically and strategically significant. The castle’s earthworks illustrate a distinctly Welsh approach to frontier fortification, emphasising natural topography over large-scale construction. Today the site is protected as a scheduled monument, marked by a blue plaque, and forms a notable landmark along local walking trails. Its isolated crag-top position preserves much of its medieval atmosphere, offering visitors an evocative glimpse into a once turbulent upland landscape. Alternate Names: Castell y Nos, Night Castle, Maerdy Motte Castell Nos Castell Nos is a medieval motte-and-bailey earthwork positioned on a steep natural pennant sandstone crag above the Rhondda Fach valley, close to the reservoir that now shares its name. The castle occupies a naturally formidable outcrop, which has been artificially scarped to enhance its defensive profile. This combination of natural geology and deliberate shaping creates a dramatic and highly defensible position overlooking the narrow upland valley route. The motte is the primary surviving element. Instead of being an artificial mound, the builders exploited the natural rock, carving and steepening its sides to form a citadel-like platform. The summit is relatively level and large enough to have accommodated a timber tower or fortified lookout structure, likely used to observe movement along the Rhondda–Brecon watershed. The height and sharp scarping of the motte’s sides still give a strong sense of its original power, even though vegetation now softens its edges. Traces of the bailey lie to the northwest, where a slight platform and shallow ditch mark the former enclosure. A more pronounced defensive ditch survives on the northern approach, cut roughly three metres below the motte’s base. The central gap in this ditch is thought to indicate the footings of a medieval drawbridge abutment or timber bridge support. The bailey would have contained timber buildings essential to daily operation, including storage huts, animal pens and workspaces for weapons, tools and supplies. Castell Nos was likely built by the Welsh lords of Meisgyn, descendants of the native ruler Iestyn ap Gwrgant, during the mid thirteenth century. Its construction corresponds to the period following the de Clare expansion into Glyn Rhondda after 1246, when frontier tensions between Welsh upland lords and Norman settlers in Glamorgan were acute. Small but strategically placed fortifications such as Castell Nos helped secure upland routes, protect local communities and assert territorial authority. Its position on the watershed between the Rhondda valleys and Brecon was especially important. The route provided one of the key connections between upland Glamorgan and the interior of Wales, and whoever held Castell Nos controlled movement across this boundary. The steep surrounding slopes and marsh-influenced valley floor would have further restricted access, making the site defensible despite its modest size. Though never developed into a stone castle, Castell Nos remained symbolically and strategically significant. The castle’s earthworks illustrate a distinctly Welsh approach to frontier fortification, emphasising natural topography over large-scale construction. Today the site is protected as a scheduled monument, marked by a blue plaque, and forms a notable landmark along local walking trails. Its isolated crag-top position preserves much of its medieval atmosphere, offering visitors an evocative glimpse into a once turbulent upland landscape.