Candleston Castle
Updated: Aug 19, 2025
Historic Overview
Candleston Castle (Castell Treganna) is a 14th-century ruined manor tower-house located within a D-shaped enclosure at Merthyr Mawr Warren, near the village of Treganlaw. The site, situated in the fee of Merthyr Mawr, was acquired in the 12th century by the St Quintin lords of Llanbleddian and Talyfan. The castle and manor derive their name from the Cantaloupes, the first known tenants after the St Quintins sub-enfeoffed the land. Although no direct records exist of the de Cantilupe family at the site in the 12th century. The manor is possibly sited on an earlier enclosure, replacing that of a previous building, based upon the presence of remnants of an earlier wall. Perhaps in-use as an elite dwelling and consequently modified. The castle's position across a narrow promontory suggests a defensive role. Merthyr Mawr is known for its archaeological significance, spanning Prehistoric, Roman, and Medieval periods.
The castle is thought to have been built by Robert de Canteilupe III, who held land at Candleston in 1320 according to the Despenser Survey of Glamorgan. After Robert's death, ownership likely passed to John de Cantilupe, possibly the Abbot of Margam in 1315. The manor passed through the Cantilupe family to the Cradocks, beginning with Janet Cantilupe's marriage to Richard Cradock around 1468. Sir Matthew Cradock later inherited the property and undertook refurbishment in the late 15th century. The manor was subsequently inherited by his daughter, Margaret, and her husband, Sir Richard Herbert, who made further alterations. By 1596, the property was referred to as Cantelowstowne.
By 1635, the castle was known as Cantloston. The manor passed to the Doddington family through Mary Herbert's marriage to Sir William Doddington, and later to the Greville family through Robert Greville's marriage to their granddaughter. The Grevilles made minimal modifications before selling the property to the Franklen family in the 18th century. In 1830, the manor was sold to Judge and MP John Nicholl, who used it as a residence while building his own manor. The castle remained a farmhouse until the late 19th century, after which it was abandoned. In the Victorian and early 20th centuries, the site hosted rifle shooting practices by territorial soldiers. In 1903, the Glamorgan Yeomanry held shooting competitions at the castle.
Architectural Overview
The structural remains at Candleston Castle reflect four principal phases of masonry construction. The initial phase was the most architecturally significant, establishing a layout that influenced all subsequent developments. Minor, undated additions suggest continuous occupation from the 14th to the 19th century. The manor comprises a two-storey range with a first-floor hall and an eastern solar tower, enclosed by a stone curtain wall. An excavation in 1930 uncovered a boundary feature believed to date shortly after 1578. In the early 19th century, modifications included the addition of a stable, crenelations for ornamental effect, and a defensive tower. Near the site of a windmill uncovered in 1823, the stepped base of a Calvary cross—of uncertain date—was discovered, with a fallen cross lying beside it.
Modern Legacy
In the 21st century, Candleston Castle survives as a ruin, largely overgrown with vegetation and surrounded by woodland and farmland. The site lies within the Merthyr Mawr Nature Reserve, beneath the now-wooded sand dunes and adjacent to the Wales Coast Path. The surrounding area supports diverse flora and fauna, including wildfowl, butterflies, moths, autumn gentian, violets, and orchids. Designated a Scheduled Monument (GM095) and a Grade II* Listed Building (Cadw Ref. 11230) since 1963, parts of the castle—particularly sections of the curtain wall—are vulnerable to vandalism and structural instability, though some areas remain in reasonable condition. The grounds are open to the public year-round, but visitors are advised to exercise caution due to the ruin’s deteriorating state.
Location
Merthyr Mawr,
Bridgend,
CF32 0PA.
NGR SS8712077250
Selected Bibliography
Cadw. (1963). Candleston Castle - Grade II Listed Building Report*. Available at: https://cadwpublic-api.azurewebsites.net/reports/listedbuilding/FullReport?id=11230 (Accessed 23 Mar. 2025).
Coflein. (2024). Candleston Castle. NPRN 93050. Available at: https://coflein.gov.uk/en/site/93050/ [Accessed 23 Mar. 2025]
Davies, R. (2008) The Castles of Wales (2nd ed.). Cardiff: University of Wales Press.
Heneb. (2024). Candleston Castle. PRN 00258m. Archwilio. Available at: https://archwilio.org.uk [Accessed 23 Mar. 2025]
Nichols, J. (2007) The Medieval Welsh Castles (1st ed.). London: The History Press.
Williams, G. (2001) Castles and Fortifications in Wales: From the Romans to the Normans (1st ed.). London: Sutton Publishing.
Cite this work
Harvard or APA Style
Dallimore, J. (2025 March 23). Candleston Castle. The Archaeology Addict. Retrieved from https://thearchaeologyaddict.wixsite.com/thearchaeologyaddict/post/candleston-castle
MLA Style
Dallimore, Jessica J. "Candleston Castle" The Archaeology Addict. The Archaeology Addict. 23 Mar 2025. https://thearchaeologyaddict.wixsite.com/thearchaeologyaddict/post/candleston-castle
Chicago Style
Dallimore, Jessica J. "Candleston Castle" The Archaeology Addict. Last modified March 23, 2025. https://thearchaeologyaddict.wixsite.com/thearchaeologyaddict/post/candleston-castle
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