Very little of the castle erected by Richard de Redvers, who died in 1137, remains; but on an artificial mound at no great distance to the north of the Priory Church stand fragments of the east and west walls of the square Norman keep, about 20 feet high and 10 feet thick. The castle belonged to the De Redvers, Earls of Devon, till they were alienated to the crown in the 9th year of Edward I. (1280), the last earl having died in 1263, though the last female descendant lived till 1293. In 1331, Edward III. granted the castle and land to William de Montacute, Earl of Salisbury; after the execution of John de Montacute in 1400 for the part he took in the plots against the new king, Henry IV., Sir Thomas West, who lies buried in the Lady Chapel, was appointed constable. He died in 1405, then Thomas, Earl of Salisbury, held the castle till 1428. After this it was held by various persons, and we find a constable of the Lordship of Christchurch as late as 1656. The manor held by the De Redvers, and then by the Montacutes, passed through various hands. Among the holders we may notice the Nevilles, hence the connection with the Priory of the ill-fated Margaret, the kingmaker's granddaughter, who was Countess of Salisbury in her own right, the Earl of Clarendon, Sir George Rose, and the present owner, the Earl of Malmesbury, who obtained it in 1862. In early days the bailiff of the de Redvers regulated all markets, fairs, tolls, and fines, and had the right of preemption and sat as judge in the tenants' court. Edward I. relieved the burgesses of Christchurch from all arbitrary exactions, and established a fixed fee-farm rent instead. The castle was taken for the Parliament by Sir William Waller with 300 men on April 7, 1644.