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Carmarthen Castle is a medieval fortress founded in the late eleventh century, established by the Norman conqueror Rhys ap Tewdwr or his successors as part of the consolidation of Norman power in South Wales. The castle occupies a commanding position on a motte overlooking the River Tywi and the town of Carmarthen, comprising earthwork defences and later stone structures that reflect multiple phases of construction and modification through the medieval period. The site remained strategically important throughout the twelfth and thirteenth centuries, serving as a centre of administrative and military control for the Anglo-Norman lordship of Carmarthen. Today the castle survives principally as earthwork remains, including the motte and bailey structure, with fragmentary stone elements that attest to its former significance as one of the principal Norman strongholds in South Wales.
Carmarthen Castle is a scheduled monument protected by Cadw under reference CM008. View the official record →
Carmarthen Castle is a medieval fortress founded in the late eleventh century, established by the Norman conqueror Rhys ap Tewdwr or his successors as part of the consolidation of Norman power in South Wales. It is designated a Scheduled Ancient Monument by Cadw under reference CM008.
Carmarthen Castle dates from the medieval period, and is classified as a castle. It is one of over 32,000 scheduled monuments protected across the UK.
Carmarthen 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 CM008.
Several scheduled monuments lie within 10 km, including Standing Stone NNW of Clomendy (5.7 km), Meini Llwydion Burial Chamber (5.8 km), Banc y Bettws Castle Mound (6.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Carmarthen 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.
Carmarthen Castle stands on Arenig Rocks (Undifferentiated), bedrock that formed in the Arenigian. The rock here is mudstone, siltstone and sandstone.