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Llanboidy Mound and Bailey Castle is a medieval motte and bailey castle situated in Wales and protected as a scheduled ancient monument under Cadw reference CM098. The site exploits a naturally defensive position afforded by its underlying geology of Llanvirn Rocks, Whiterock series mudstones, siltstones and sandstones, which would have provided a stable foundation for the earthwork defences typical of this castle type. The two-part structure characteristic of motte and bailey designs—a high mound with a palisaded summit and an adjacent enclosed courtyard—represents a form of fortification widely adopted across Norman-held territories from the eleventh century onwards.
The mound at Llanboidy would have supported a wooden keep or tower, commanding views across the surrounding landscape and serving both military and administrative functions for the local lordship. The bailey, or outer ward, provided ancillary space for garrison buildings, stores and domestic facilities. Such castles were relatively rapid to construct and maintain, making them ideal for establishing control over newly conquered or threatened territory.
The castle's earthwork remains, preserved in the Welsh landscape, survive as a valuable record of medieval settlement patterns and the exercise of feudal authority. The site's topographical prominence and geological substructure continue to define its character as a defensive stronghold, anchoring it firmly within the medieval geography of Wales.
Llanboidy Mound & Bailey Castle is a scheduled monument protected by Cadw under reference CM098. View the official record →
Llanboidy Mound and Bailey Castle is a medieval motte and bailey castle situated in Wales and protected as a scheduled ancient monument under Cadw reference CM098.
Llanboidy Mound & Bailey Castle dates from the medieval period, and is classified as a motte and bailey. It is one of over 32,000 scheduled monuments protected across the UK.
Llanboidy Mound & Bailey Castle 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 CM098.
Several scheduled monuments lie within 10 km, including Whitland Abbey (5 km), Llangan Church Cropmark Enclosure (6 km), St Canna's Chair (6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Llanboidy Mound & Bailey Castle'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.
Llanboidy Mound & Bailey Castle stands on Llanvirn Rocks (Undifferentiated), bedrock that formed in the Whiterock. The rock here is mudstone, siltstone and sandstone.