Petworth House in the parish of Petworth, West Sussex, England, is a late 17th-century Grade I listed country house, rebuilt in 1688 by Charles Seymour, 6th Duke of Somerset, and altered in the 1870s to the design of the architect Anthony Salvin. It contains intricate wood-carvings by Grinling Gibbons (d.1721). It is the manor house of the manor of Petworth. For centuries it was the southern home for the Percy family, Earls of Northumberland. Petworth is famous for its extensive art collection made by the Northumberland and Seymour/Somerset families and George Wyndham, 3rd Earl of Egremont (1751-1837), containing many works by his friend J. M. W. Turner. It also has an expansive deer park, landscaped by Capability Brown, which contains a large herd of fallow deer. History Medieval Manor House The manor of Petworth first came into the possession of the Percy family as a royal gift from Adeliza of Louvain, the widow of King Henry I (1100-1135), to her brother Joscelin of Louvain. He later married the Percy heiress and adopted the surname Percy. His descendants became the Earls of Northumberland, the most powerful family in northern England. The Percy family, whose primary seat was at Alnwick Castle in Northumberland, bordering Scotland, intended Petworth to be for their occasional residence only. The site was previously occupied by a fortified manor house built by Henry de Percy, 1st Baron Percy (1273–1314) in 1308–9, the chapel and undercroft of which still survive as part of the current house. However, in the 16th century, the Percy family came into conflict with the crown as the staunchly Catholic family fell foul of the English Reformation which resulted in Petworth being briefly taken from them by Henry VIII, restored to them by Queen Mary I before the wider family came under scrutiny during the reign of Queen Elizabeth I. Thomas Percy, 7th Earl of Northumberland allied the family to Mary, Queen of Scots and led the 1569 Rising of the North against the Queen with the aim of deposing her and placing Mary on the throne - this failed and led to his execution for treason in 1572. His younger brother, Henry Percy, 8th Earl of Northumberland, would regain his title from the Queen after begging her mercy and was granted his freedom on the condition that the family be confined to Petworth where they could be observed by the court. The house at