Warwick Castle. Warwick Castle is a medieval castle developed from a wooden fort, originally built by William the Conqueror during 1068. Warwick is the county town of Warwickshire, England, situated on a bend of the River Avon. The original wooden motte-and-bailey castle was rebuilt in stone during the 12th century. During the Hundred Years War, the facade opposite the town was refortified, resulting in one of the most recognisable examples of 14th-century military architecture. It was used as a stronghold until the early 17th century, when it was granted to Sir Fulke Greville by James I in 1604. Greville converted it to a country house and it was owned by the Greville family, who became Earls of Warwick in 1759, until 1978 when it was bought by the Tussauds Group. In 2007, the Tussauds Group was purchased by The Blackstone Group which merged it with Merlin Entertainments; Warwick Castle was then sold to Nick Leslau's investment firm Prestbury Group under a sale and leaseback agreement. Merlin continues to operate the site under a renewable 35-year lease. Warwick Castle is situated in the town of Warwick, on a sandstone bluff at a bend of the River Avon. The river, which runs below the castle on the east side, has eroded the rock the castle stands on, forming a cliff. The river and cliff form natural defences. When construction began in 1068, four houses belonging to the Abbot of Coventry were demolished to provide space. The castle's position made it strategically important in safeguarding the Midlands against rebellion. During the 12th century, King Henry I was suspicious of Roger de Beaumont, 2nd Earl of Warwick. To counter the earl's influence, Henry bestowed Geoffrey de Clinton with a position of power rivalling that of the earl. The lands he was given included Kenilworth-a castle of comparable size, cost, and importance, founded by Clinton-which is about 8 kilometres to the north. Warwick Castle is about 1.6 kilometres from Warwick railway station and less than 3.2 kilometres from junction 15 of the M40 motorway; it is also close to Birmingham Airport. An Anglo-Saxon burh was established on the site in 914; with fortifications instigated by Othelfled, daughter of Alfred the Great. The burh she established was one of ten which defended Mercia against the invading Danes. Its position allowed it to dominate the Fosse Way, as well as the river valley and the crossing over the River Avon. Though the motte to the south-west of the present castle is now called Ethelfleda's Mound, it is in fact part of the later Norman fortifications, and not of Anglo-Saxon origin. It was also at this time that what is now Warwick School was founded in the castle-making it arguably the oldest boys' school in the country. It still resides just over the river Avon, but a stone's throw away, and visible from all of the castle's towers. After the Norman conquest of England, William the Conqueror established a motte-and-bailey castle at Warwick in 1068 to maintain control of the Midlands as he advanced northwards. Building a castle in a pre-existing settlement could require demolishing properties on the intended site. In the case of Warwick, the least recorded of the 11 urban castles in the 1086 survey, four houses were torn down to make way for the castle. A motte-and-bailey castle consists of a mound-on which usually stands a keep or tower-and a bailey, which is an enclosed courtyard. William appointed Henry de Beaumont, the son of a powerful Norman family, as constable of the castle. In 1088, Henry de Beaumont was made the first Earl of Warwick. He founded the Church of All Saints within the castle walls by 1119; the Bishop of Worcester, believing that a castle was an inappropriate location for a church, removed it in 1127-28. In 1153, the wife of Roger de Beaumont, 2nd Earl of Warwick, was tricked into believing that her husband was dead, and surrendered control of the castle to the invading army of Henry of Anjou, later King Henry II of England. According to the Gesta Regis Stephani, a 12th-century historical text, Roger de Beaumont died upon hearing the news that his wife had handed over the castle. King Henry II later returned the castle to the Earls of Warwick, as they had been supporters of his mother, Empress Matilda, in The Anarchy of 1135-1154. During the reign of King Henry II, the motte-and-bailey was replaced with a stone keep castle. This new phase took the form of a shell keep with all the buildings constructed against the curtain wall. During the Barons' Rebellion of 1173-74, the Earl of Warwick remained loyal to King Henry II, and the castle was used to store provisions.