St Quintins Castle is a castle located in the village of Llanblethian, Cowbridge, Wales. It is a scheduled monument and a Grade II listed building and is under the care of Cadw. The site was first occupied with a defensive structure in about 1102 and the gatehouse and further building work took place around 1312. It was later used as a prison and was reported as being in a ruinous state by 1741.
Around 1102 Robert Fitzhamon, the first Norman Lord of Glamorgan bequeathed the lands of Llanblethian as a lordship to Herbert de St Quentin who is thought to have built the first fortification at the site of the castle. This initial construct was believed to have been a simple ringwork defence with timber walls, a bank and ditch. A rectangular stone keep was built in the late 12th century, whose remains can now be found within the later gatehouse. This keep may have replaced a similar wooden structure.
14th century reinforcements
The lordship remained with the St Quentin family until 1233 when the land was seized by Richard Siward, but he then lost it to Earl Richard de Clare in 1245. Richard de Clare seized large areas of this part of Glamorganshire, from Cowbridge to Llantrisant, but it was his grandson, Earl Gilbert de Clare, who began to build the stone structure of St Quintins Castle which stands today. This was thought to have been roughly after 1307, but Gilbert de Clare was killed in the Battle of Bannockburn in 1314 before the castle was completed. Modern historians believe that the lack of inner courtyard buildings and the weakness of the curtain wall points to the hypothesis that the castle was never fully completed.
Defensive layout
The castle itself is a rectangular stone walled enclosure, roughly 64 metres East to West. The walls are roughly 120 centimetres in thickness. It is set on a spur above steep slopes on all sides apart from the East side. The weak East side of the fortification is protected by a twin-tower gatehouse and a further two towers East entrance facade. The best defensive side is the southern side which falls away sharply to the River Thaw. It was reported as being ruinous by 1741.
The castle today
The base of a semi-octagonal tower can be seen at the southeast corner of the castle and parts of a tower at the southwest corner. The ivy-clad gatehouse is between these and is a substantial structure where you can see the slits for the two portcullises and the fittings for the sets of strong doors. The remains of the keep are largely rubble and little remains of the bailey walls on the east, north and south sides.

St Quintins Castle

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Old Beaupre Castle is a ruined medieval fortified manor house located in the community of Llanfair, outside Cowbridge in Wales. It is known in historic documents under the names Beawpire, Bewerpere, Bewpyr and Y Bewpur. It is a Grade I listed building and is presently under the care of Cadw. It can be visited free of charge all year round by members of the public.
Although called Old Beaupre Castle the structure is seen as a fortified manor house. The original house was an L-shaped building, now located within the inner courtyard, built circa 1300 and from this period until the 18th century it was owned by the Basset family. During the 16th century intensive remodelling was undertaken, started by Sir Rice Mansel, continued by William Basset and completed by William's son, Richard. This additional work added the impressive outer gatehouse, completed in 1586 and a three-storeyed Renaissance porch, completed 1600, along with the buildings around the middle court. The buildings on the west side of the middle court, now roofless, provided luxurious living accommodation with large windows, handsome fireplaces, a fine stone stairway, and numerous privies connected to a drain along which water still flows.
After the 16th century alterations little work was carried out on Beaupre, and after the English Civil War the Basset family fortunes went into decline. At the beginning of the 18th century, the Basset inheritance eventually passed to the Jones family. The Jones family decided not to settle in Beaupre Castle and chose to use the smaller and more convenient mansion of New Beaupre. Beaupre was sold in 1709, and by that time it was in a state of disrepair with only part of it still habitable. Nevertheless, there is some evidence that it continued to be at least partly occupied as various fireplaces and windows were blocked up, presumably to reduce the taxes payable. The southeastern block continues to be occupied up to the present time as a farmhouse and has a separate listing on the historic buildings register.
The site
This mansion dates from the sixteenth or seventeenth century but is built on remnants of a building dating from about 1300. It occupies a site about 100 metres (330 ft) long and 25 to 56 metres (82 to 184 ft) wide, orientated in a north/south direction. The building is arranged around three courts, the fine gatehouse being on the south side connecting the outer to the middle court. The oldest part of the building is the south block where the original gatehouse can be seen to the left of the later one; this older entrance has a Tudor window inserted into the blocked arch.
Beaupre Castle has few outwardly looking windows and appears like a series of fortified barns. The main entrance is via the gatehouse reached via a low walled outer courtyard. The gatehouse is a three storey structure surrounded by a curtain wall. The inner porch stands out from the rest of the courtyard with smooth ashlar stonework in comparison to the rough local stonework surrounding it. The porch, designed by Richard Twrch, consists of varying architectural styles including a Tudor arch, strapwork decoration and three tiers of flanked columns. The columns rise in ascending order from Doric to Ionic to Corinthian and the second tier bears the Basset family heraldic set on panels. Through the entrance porch is the fourteenth century great hall, now without a roof. The windows were probably enlarged in the sixteenth century but the fine, heraldic fireplace dates back to the fourteenth century.[1]

The range on the east side of the middle court has no roof and is four storeys high. Its southern elevation has a doorway at ground level on either end, three sets of four-light windows towards the right end and six pairs of two-light windows at the left end. The range on the west side of the middle court is three storeys high, has no floor or roof and dates from about 1540. Its northern elevation has three sets of four-light mullioned windows which are centrally placed.
Visitor information
Old Beaupre Castle is a scheduled monument, a Grade I listed building, listed because it is a fine example of a medieval manor house, modified during the Tudor period, and its carved Renaissance porch is particularly impressive. Old Beaupre Castle is under the care of Cadw. The property is open all year round free of charge. A small car park is available 250 metres away and visitors approach the property across pastureland, with stiles and a kissing gate.

Old Beaupre Castle

Hensol Castle dates back to at least 1419. From its early days to the present, a succession of different owners have altered, improved and added their own individual tastes and designs.
The Hensol estate was first found to be owned by the Jenkins family (1419-1721). Judge David Jenkins was a man of great force and character and was known as a staunch Royalist. He took an active part against the Parliamentarians during the Civil War where he condemned several to death for activities deemed treasonable. Consequently he was captured and sent to the Tower of London and in 1648 he was brought before the House of Commons but refused to kneel at the bar and as a result fined £1,000.
In 1721 the estate was passed onto Charles Talbot through his marriage with the Jenkins heiress, Cecil Jenkins. In 1733 he was made Lord Chancellor and raised to the peerage with the title of Baron Talbot of Hensol. His son, William Talbot was thought to have great affection for Hensol and was responsible for laying out and starting the landscaping of the grounds and altering the external appearance of the house. It was the Talbot family that castellated the mansion and so Hensol Castle was born.
In 1789 Samuel Richardson bought the estate. Richardson was a wealthy banker, who later became the Sheriff of Glamorgan. He was known to have been a pioneer in agriculture and farming and was therefore thought to have made many improvements to the Hensol estate, including land drainage.
1815 saw Benjamin Hall take ownership of Hensol Castle. Benjamin Hall was highly educated and was elected MP. His son, another Benjamin Hall, was also an MP. This Benjamin Hall became the Chief Commissioner of the Metropolitan Board of Works and he oversaw the later stages of the rebuilding of the Houses of Parliament, including the installation of “Big Ben”, which is allegedly named after him as he was said to be a ‘towering figure’.
In 1824 the estate was passed onto the Crawshay family. William Crawshay was known as the “Iron King” and was also High Sheriff of Glamorgan. He improved the walled garden and extended the deer park as well as improvements to the lake and grounds. Crawshay later built Cyfarthfa Castle, another castellated mansion in Merthyr Tydfil.
In 1838 Rowland Fothergill bought the estate. Fothergill introduced a large courtyard, a clock tower and a flag tower during his ownership. He also drained the lake to add a mock castle “Summer House”; only accessible by rowing boat. Fothergill also employed T.H. Wyatt and David Brandon to help remodel Hensol Castle. They did so by improving the battlements, changing the window design and extending the North wing outwards to accommodate for the elaborate service and stable courts that the Victorians deemed essential.
In 1877 Hensol was passed down to Fothergill’s niece Lady Isabella Elizabeth Price Fothergill who married Sir Rose Lambart Price. Two of their three sons died in action, and the estate was then passed onto the third son who then put it up for sale.
In 1926 the Glamorgan County Council bought the estate and used it as a County asylum. This was a hospital for men and women with learning disabilities. In the late 20th Century there was more movement towards community care for people with learning disabilities, so the number of patients progressively decreased.
The hospital closed and in 2004 the castle and grounds were bought by local businessman, Gerald Leeke and in 2015 the castle officially opened as a wedding and conference centre.

Hensol Castle

In the 13th century St Donats was held by the de Haweys family who also had estates in Somerset and Dorset. The heiress John de Hawey married Sir Peter de Stratelynge (Stradling), a Swiss who was in command of the castle at Neath in 1296. He died soon afterwards so it was either his sons or Joan's second husband John de Pembridge who built the castle in the early 14th century. In the late 14th century, Edward Stradling was twice Sheriff of Glamorgan and his wife Gwenllian Berkerolles inherited Coity Castle. Their grandson Edward married a daughter of Henry VI's great uncle Cardinal Beaufort and became Chamberlain of South Wales in 1423. He died on pilgrimage to the Holy Land in 1453, four years after his son Henry was captured by the pirate Colyn Dolphyn while sailing to Wales from Somerset and had to be ransomed. Henry married Elizabeth Herbert of Raglan and their son Thomas died young, leaving a widow who married Sir Rhys ap Thomas. Sir Rhys became guardian of Edward, the heir, later infamous for his numerous and lawless illegitimate sons.
John Stradling was made a baronet by James I in 1611, despite the family having remained faithful to the Roman church at the Reformation. They fought for King Charles in the Civil War, a Stradling being leader of the Royalist force defeated in 1648 at St Fagans. They later declined to the status of local gentry and in 1738 Sir Thomas, the last male heir, was killed in a duel at Montpellier in France. The estate passed to his cousin Bussey, 4th Baron Mansell of Margam. On his death the estates were divided, St Donats going to Sir John Tyrrwhitt in 1755. His heirs neglected the castle, but in 1862 Dr. Nicholl-Carne, a descendant of the Stradlings, bought the castle and began restoring it as his residence. In 1901 it was sold to Morgan Stuart Williams who sought a refuge from his coal mines at Aberpergwm and carried out further work on the castle. In 1922 Richard Pennoyer bought the castle, but in 1925 he re-sold it to a fellow American, the newspaper millionaire William Randolph Hearst. The castle was commandeered for training of army officers during the war and then in 1960 was taken over by an international school called Atlantic College, which is still thriving there.
The castle lies on a promontory with precipitous cliffs on the west. An inner ward about 40m across with a polygonal wall is closely surrounded by an outer ward with a dry moat facing the eastern approach. The outer wall mostly survives and has a small original tower entirely contained with it on the north, and a square gatehouse on the east. The inner ward is entered by an arch beside the rectangular Mansell Tower on the east side. The western part of the inner curtain is gone, making room for the early 16th century north and west ranges, and the remainder has buildings of various dates against both sides of it. The late 15th-century hall lies on the south of the ward. Beside it, squeezed in between the inner and outer curtains, is the Bradenstoke Hall, a modern building re-using the early 14th-century roof. The Lady Ann tower southwest of this is also modern and on the west side of the castle is a large modern dining hall.

St Donats Castle

Fonmon is one of few mediaeval castles still lived in as a home. Since it was built by the St. John family c1200, it has only changed hands once – quite an impressive feat!  Castle open to the Public for guided tours April to September on Tuesday and Wednesday afternoons.  Opening times for individuals, families and groups of less than twelve on Tuesdays and Wednesdays between midday and 5pm, no need to book.  Public guided tours at 2pm, 3pm and 4pm priced at £6.  Access to garden and grounds is free, last entrance to garden at 4pm.  Assistance dogs only allowed Visitors are welcomed by an experienced guide and the 45 minute tour walks through the fascinating history of the Castle, its families, architecture and interiors. The Fonmon gardens are an attraction in their own right for enthusiasts and amateurs alike and visitors are free to wander and explore. Group Tours For pre-booked groups, we can provide refreshments ranging from morning coffee and afternoon tea to lunches and dinners, all enjoyed in the Castles elegant Georgian interiors Venue Hire This unique heritage property is available as an exclusive wedding and party venue, corporate and team building location, visitor attraction and host for product launches and filming.

Fonmon Castle

Coity Castle in Glamorgan, Wales, is a Norman castle built by Sir Payn "the Demon" de Turberville (fl. 1126), one of the legendary Twelve Knights of Glamorgan supposed to have conquered Glamorgan under the leadership of Robert FitzHamon (d. 1107), Lord of Gloucester. Now in ruins, it stands in the community of Coity Higher near the town of Bridgend, in the County Borough of Bridgend. Very close to the castle is the battlemented parish church of St Mary the Virgin, dating from the 14th century.
It is a Grade I listed building.
The castle began as a late 11th-century ringwork. A rectangular stone keep and the main curtain wall were added by the Normans in the 12th century, under the de Turberville family. The three-storey keep was primarily a defensive structure.
Extensive reworking took place in the 14th century, when a domestic range was attached to the keep by the middle gatehouse. New stone vaults replaced the earlier timber floors. The central octagonal pier for the vaults is still prominent among the castle ruins. An adjoining chapel wing with a tall east window was added to the first floor at the eastern end of the domestic range in the 15th century.
Thomas de la Bere died as a minor on 28 October 1414, following which the lordship reverted to Sarah de Turberville, the youngest sister of Richard de Turberville, who had apparently produced male progeny from her marriage to William Gamage. There was in the few years following Sir Lawrence Berkerolles's death much general reshuffling of property interests in Glamorgan, for example with the Stradling family. Sarah's marriage to Sir William Gamage of Roggiett, Gwent, brought the lordship into the Gamage family, where it remained until 1584. The Gamage succession was not, however, easily achieved for in September 1412, that is to say whilst the supposed true heir the minor Thomas de la Bere was still alive, William Gamage assisted by Sir Gilbert Denys (d. 1422) of Siston, Gloucestershire, and formerly of Waterton-by-Ewenny, in Coity lordship, besieged Coity for a month, trying to oust Lady Joan Verney, wife of Sir Richard Verney and daughter of Margaret de Turberville, from the Castle. Joan, it seems, had taken up residence to assert her own claim to Coity in the confusion following Berkerolles's death. As she was a female, a widow, and without a son, clearly her claim was deemed tenuous or rather completely spurious.
The king had, therefore, given a commission to his local tenants-in-chief to raise the siege and gave another commission a month later to John Grendour for the same purpose. Denys and Gamage ended up in the Tower of London for having taken the law into their own hands, from 19 November 1412 until 3 June 1413, being released after the death of Henry IV. Their action, however, proved successful in enforcing the Gamage claim to Coity. Denys's eldest daughter Joan was the wife of a certain Thomas Gamage, possibly brother of William. Another of Denys's daughters, Matilda, by his 2nd. wife, married another Thomas Gamage, son or grandson of William and Sarah, and thereby became Lady of Coity on her husband's succession, producing a son and heir John Gamage.
During the 16th century, Coity Castle, by then owned by the Gamage family, underwent a complete remodelling of the living quarters, including the addition of a storey, new windows, and two chimney stacks. The principal chambers lay on the upper floors. The range of domestic apartments comprised a central first-floor hall set above a vaulted undercroft, from which it was reached by a grand spiral stair. To the west were ground-floor service rooms, probably including a kitchen, with ovens. The base of a ruined large malting kiln remains. On the far side of the range, a tower projecting from the curtain wall contained latrines. The second floor housed private apartments.
The Gamage family held Coity until the death of John Gamage in 1584. The castle was abandoned around the 17th century.[citation needed] The castle was sold in the 18th century to the Edwins of Llanharry. Through the Edwins, the Coity lordship passed to the Earls of Dunraven.
The castle ruins are now in the care of Cadw.

Coity Castle

Newcastle Castle is a medieval castle located on Newcastle Hill, overlooking the town centre of Bridgend in Glamorgan, South Wales. It was originally believed to date from 1106 when a ringwork was created at the site by the Norman baron Robert Fitzhamon. Some of the fine stonework survives, but today the castle is ruinous.
Newcastle Castle was initially constructed as a ringwork 1106 by William de Londres, one of the legendary Twelve Knights of Glamorgan, as part of the Norman invasion of Wales. William de Londres was a knight loyal to the Norman baron Robert Fitzhamon and the Newcastle defences marked the most western extent of Fitzhamon's lordship. It is one of three castles built by the Normans in the area at the time, the others being Coity Castle and Ogmore Castle.
The defences were strengthened either by William Fitz Robert, 2nd Earl of Gloucester, shortly before his death in 1183 or by Henry II who took over the lordship of Glamorgan on William's death. The additional works had the construction of a 2-m-thick curtain wall which surrounded a courtyard which was 40 m in length. The main reason behind these new defences was believed to be a response to the uprising in Glamorgan led by the Welsh Lord of Afan, Morgan ap Caradog. Henry died in 1189, and the ownership of Newcastle fell to Prince John, who that year handed the castle to Morgan ap Caradog. When Morgan died circa 1208, he was succeeded by his son Lleison. On Lleison's death, thought to be around 1214, the castle came into the ownership of Isabel, Countess of Gloucester, the first wife of King John. In 1217, the ownership changed again, staying briefly with the Anglo-Norman baron Gilbert Fitz Richard, who in the same year handed the castle over to Gilbert de Turberville, who preferred to continue living at Coity Castle.
The site
The castle is notable for the high quality of the stonework, especially that of the Norman doorway. This is late 12th century, and was likely constructed at the same time as the high curtain walls and the two square towers which they support. Only the base of the west tower survives, but the south tower has three storeys. This was remodelled for living quarters in the 16th century, when Tudor windows and fireplaces were added.
Visitor information
Newcastle Castle is under the care of Cadw. It is open free of charge throughout the year. A a small parking area adjoins the site. A flight of 10 steps between the two main grassland levels restricts access for wheelchair users.

Newcastle

Ogmore Castle is a Grade I listed castle ruin located near the village of Ogmore-by-Sea, south of the town of Bridgend in Glamorgan, South Wales. It is situated on the south bank of the River Ewenny and the east bank of the River Ogmore.
Its construction might have begun in 1106. Ogmore was one of three castles built in the area in the early 12th century, the others being Coity Castle and Newcastle Castle. It was in use until the 19th century for a range of purposes, including a court of justice and a prison, but is now a substantial set of remains and a local landmark. It is managed by local authorities.
Construction of Ogmore Castle might have started around 1106, its foundation predating the Norman conquest. In Caradoc of Llancarfan's The historie of Cambria, now called Wales: a part of the most famous yland of Brytaine, Caradoc wrote that the manor and castle were given to William de Londres, one of the legendary Twelve Knights of Glamorgan, by Robert Fitzhamon, the Norman conqueror of Glamorgan. In 1116, William de Londres was forced to abandon the castle when the Welsh appeared in force. His butler, Arnold, is credited with protecting the castle from the Welsh attack during the absence of William de Londres, and for this, he was knighted Sir Arnold Butler, also receiving the castle and manor of Dunraven as reward.
According to the custom of the times, the founding of a religious institution followed the acquisition of power. William de Londres, or his descendant John, built Ewenny Abbey 1 mile (1.6 km) from the castle. Also nearby was a religious place appended to Ogmore Castle by Morris de Londres or his descendant John, in 1141; Ewenny Priory is 2 miles (3.2 km) from Ogmore Castle. When Thomas' heiress married into the Chaworth family of Kidwelly, the lands passed in 1298 to the first Duke of Lancaster, and ownership remains in the hands of the Duchy of Lancaster to this day.

Ogmore Castle

Candleston Castle is a 14th-century fortified manor house, in ruins since the 19th century. It is .75 miles (1.21 km) southwest of Merthyr Mawr, former Glamorgan, Wales, now Bridgend county borough and just .75 miles (1.21 km) northwest of Ogmore Castle, separated by the River Ogmore. Candleston's original long and narrow rectangular structure lay across the western end of a low narrow promontory, suggesting a defensive position. The castle is believed to be named after the Norman family of Cantilupe, thought to be its first feudal tenants.
The ruins of Candleston, which had been part of a medieval settlement, stand on the Merthyr Mawr Sand Dunes, on the edge of the Merthyr Mawr Warren. They are east of Porthcawl off of Swansea Bay.
History
12th – 14th centuries
In the 12th century, Candleston manor passed to the St Quintin lords of Talyfan and Llanbleddian; The Cantilupe family are considered Candleston's first tenants. Although there are no records to show that the de Cantilupes were at the site in the 12th century, it is believed that the name Candleston is derived from their name, variously spelled Cantulupo, Cantilupo, Cantelo. In 1596 it was called Cantelowstowne and in 1635 Cantloston. It was Tregantlow in Welsh, Tref or Tre meaning town.
Candleston Castle, a fortified manor, was built in the 14th century. An enclosure, in the shape of a D, surrounded the structure. The late-medieval manor may have been constructed on the site of a previous building, based upon the presence of remnants of an earlier wall. The castle may have been built by Robert de Canteilupe III, who owned one ploughland at Candleston in 1320 according to the Despenser Survey of Glamorgan of that year. Robert III, who is not recorded after 1320, may have been succeeded by John de Cantilupe, who may have been the Abbot of Margam in 1315. Robert de Cantilupe III's daughter Joan, heiress of Candleston, married Sir William Horton of Tregwynt, Pembrokeshire.
Sands from the dunes shifted starting in the late 14th century and encroached on nearby Kenfig Castle, resulting in its evacuation. The Royal Commission on Ancient and Historical Monuments in Wales reported that Candleston's "elevated position was just sufficient to save it from the encroaching sand dunes on the northern fringe of the Merthyr Mawr Warren, which entirely surrounded the promontory and formed a relatively stable margin close to the southern wall of the castle."
15th – 19th centuries
Candleston passed through Joan Cantilupe Horton and Sir William Horton's son Jenkin, who may not have resided at Candleston, to Jenkin's daughter Jennet or Janet. The manor then went to the Cradocks when Janet married Richard Cradock about 1468.[7] Nicholas Horton briefly resided at Candleston and paid a small quit rent in 1411 for what is believed to be Candleston to the lord of Merthyr Mawr.
Joan Robert, reported to be the daughter of Margaret Cantilupe, married John Eyre. In 1412 and 1429, Eyre is recorded as Candleston's landholder. Janet Horton and Richard Cradock received Candleston, possibly because the Eyres did not have children or due to the nature of their tenure.
Janet and Richard Cradock's son, Sir Mathew Cradock (about 1468–1531) inherited the property. During his career, he was steward of Gower, Chancellor of Glamorgan and constable for life of the Kenfig and Caerphilly castles. In the late 15th century the manor was refurbished and modified; It is believed that Mathew Cradock was responsible for the construction. His only child, Margaret, was heiress of the manor. Sir Richard Herbert married Margaret. He was from Ewyas, Hereford. In around 1500 alternations were made to the Hall range. It had a four-centred, local green sandstone ogee arch, pointed and chamfered arch tower, parapet corbelling of the roofs, and an "impressive perpendicular chimneypiece".
George Herbert of Swansea inherited Candleston from Margaret and Sir Richard Herbert. Mathew Herbert, George's son then held Candleston. Brothers, grandsons of Sir George Herbert, had the manor next. First, Sir William Herbert had the manor in 1598, then Sir John Herbert inherited the manor after his brother's death in 1609. Sir John died in 1617 and Mary, his daughter and heiress, married Sir William Doddington.
Robert Greville, 4th Baron Brooke of Warwick married Doddington's granddaughter. His brother inherited the property upon his death in 1676. Francis Greville, great-grandson of the brother, was Earl of Warwick and 8th Baron Brook. The manor was held by the Grevilles, who visited only occasionally, made only minor modifications, and sold it to the Franklen family in the 18th century. Between 1806 and 1808, Sir John Nicholl resided at the manor while his manor was built. Candleston Castle was sold by Richard Franklen to Nicholl in 1830, when it was said to have included a drawing room, dining room, breakfast rooms, four bedrooms and a coach house. It was evacuated in the 19th century, after having operated as a farm house.
In the early 19th century modifications included construction of a stable, the castle was crenellated[5] for ornamental purposes and a defensive tower was built. The stepped base of a Calvary cross, of unreported date, with the fallen cross itself lying alongside, was found near the windmill uncovered by sand in 1823.
20th – 21st centuries
In the 21st century, the castle is an "ivy covered ruin". Wildfowl, butterflies, moths, autumn gentian, violets and orchids are seen in the area. The area around the castle is woodland and farm land. The nearby Merthyr Mawr dunes are among northwestern Europe's "highest and most voluminous" sand dunes, and it is the "second highest mobile sand dune system in Europe." The dunes west of Candleston Castle are more than 80 metres (260 ft) above sea level and are now fairly stabilised.

Candleston Castle

St Fagans Castle is an Elizabethan mansion in St Fagans, Cardiff, Wales, dating from the late 16th century. The house and remaining medieval fortifications are Grade I listed. The grounds of St Fagans Castle now contain St Fagans National Museum of History.
A medieval castle dating from the 13th century previously existed on the site. By 1536 it lay in ruins. By 1563 the site had been sold to a Dr John Gibbon. A new house was built on the site either by Gibbon or by Nicholas Herbert, who bought the site from Gibbon in 1586. Part of the D-shaped medieval boundary fortifications remain, forming a wall around the current house.
Sir Edward Lewis of The Van, Caerphilly, bought the house in 1616 and the interior dates partly from then and partly from after 1850, when it became the summer residence of the Windsor-Clive family. The property was part of the estate of the Earls of Plymouth and, in 1833, was inherited by Lady Harriet Clive who proceeded to restore the building. The sequence of terraces in the gardens was created for the Windsor-Clives in 1865–6 and extended in the early 20th century. The house became a convalescent hospital for soldiers during World War I, with the banqueting hall containing a ward of 40 beds.
In 1947 the Windsor-Clives gave the house and grounds to the Amgueddfa Cymru - National Museum Wales and the grounds subsequently became the site of the Welsh Folk Museum, now St Fagans National Museum of History.
St Fagans Castle became a Grade I listed building in 1977. The lead water cistern in the courtyard of the castle is Grade II* listed, while a number of features in the gardens are listed as Grade II.

St Fagans Castle

Castell Coch (Welsh pronunciation is a 19th-century Gothic Revival castle built above the village of Tongwynlais in South Wales. The first castle on the site was built by the Normans after 1081, to protect the newly conquered town of Cardiff and control the route along the Taff Gorge. Abandoned shortly afterwards, the castle's earth motte was reused by Gilbert de Clare as the basis for a new stone fortification, which he built between 1267 and 1277 to control his freshly annexed Welsh lands. This castle was likely destroyed in the native Welsh rebellion of 1314. In 1760, the castle ruins were acquired by John Stuart, 3rd Earl of Bute, as part of a marriage settlement that brought the family vast estates in South Wales.
John Crichton-Stuart, the 3rd Marquess of Bute, inherited the castle in 1848. One of Britain's wealthiest men, with interests in architecture and antiquarian studies, he employed the architect William Burges to reconstruct the castle, "as a country residence for occasional occupation in the summer", using the medieval remains as a basis for the design. Burges rebuilt the outside of the castle between 1875 and 1879, before turning to the interior; he died in 1881 and the work was finished by Burges's remaining team in 1891. Bute reintroduced commercial viticulture into Britain, planting a vineyard just below the castle, and wine production continued until the First World War. The Marquess made little use of his new retreat and in 1950 his grandson, the 5th Marquess of Bute, placed it into the care of the state. It is now controlled by the Welsh heritage agency Cadw.
Castell Coch's external features and the High Victorian interiors led the historian David McLees to describe it as "one of the greatest Victorian triumphs of architectural composition." The exterior, based on 19th-century studies by the antiquarian George Clark, is relatively authentic in style, although its three stone towers were adapted by Burges to present a dramatic silhouette, closer in design to mainland European castles such as Chillon than native British fortifications. The interiors were elaborately decorated, with specially designed furniture and fittings; the designs include extensive use of symbolism drawing on classical and legendary themes. Joseph Mordaunt Crook wrote that the castle represented "the learned dream world of a great patron and his favourite architect, recreating from a heap of rubble a fairy-tale castle which seems almost to have materialised from the margins of a medieval manuscript."

The surrounding beech woods contain rare plant species and unusual geological features and are protected as a Site of Special Scientific Interest.