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St Illtyd Castle Mound is a medieval motte located in the parish of Llantwit Major in the Vale of Glamorgan, Glamorgan, Wales. The earthwork consists of a substantial mound typical of early Norman fortifications, dating to the late eleventh or twelfth century, and represents the defensive architecture established during the Anglo-Norman conquest and settlement of South Wales. The site's proximity to the ecclesiastical centre of Llantwit Major, one of the most significant early medieval monastic foundations in Wales, suggests strategic significance in controlling both secular and religious authority within the region. The monument survives as a scheduled archaeological site under Cadw's protection, preserving evidence of the military organisation and territorial expansion of the Norman lords who dominated Glamorgan during the High Medieval period.
St Illtyd Castle Mound is a scheduled monument protected by Cadw under reference MM141. View the official record →
St Illtyd Castle Mound is a medieval motte located in the parish of Llantwit Major in the Vale of Glamorgan, Glamorgan, Wales. It is designated a Scheduled Ancient Monument by Cadw under reference MM141.
St Illtyd Castle Mound dates from the medieval period, and is classified as a motte. It is one of over 32,000 scheduled monuments protected across the UK.
St Illtyd Castle Mound 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 MM141.
Several scheduled monuments lie within 10 km, including Pen y Fan Canal Reservoir (2.5 km), Cwmbyrgwm Colliery (3.7 km), Old Beam Pump & Winding Engine, Glyn Pits (5.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of St Illtyd Castle Mound'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.
St Illtyd Castle Mound stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.