George O'Brien Wyndham, 3rd Earl of Egremont FRS (18 December 1751 – 11 November 1837) of Petworth House in Sussex and Orchard Wyndham in Somerset, was a British peer, a major landowner and a great art collector. He was interested in the latest scientific advances. He was an agriculturist and a friend of the agricultural writer Arthur Young, and was an enthusiastic canal builder who invested in many commercial ventures for the improvement of his estates. He played a limited role in politics. He was a great patron of art and the painter J. M. W. Turner lived for a while at his Sussex seat of Petworth House. Several other painters including John Constable, C. R. Leslie, George Romney, the sculptor John Flaxman, and other talented artists received commissions from Wyndham, who filled his house with valuable works of art. The earl was a sponsor of the Petworth Emigration Scheme intended to relieve rural poverty caused by overpopulation. Generous and hospitable, blunt and eccentric, the earl was in his day a very prominent figure in English society. Charles Greville assessed him as "immensely rich and his munificence was equal to his wealth" and wrote that "in his time Petworth was like a great inn." Though Wyndham had more than 40 children, the only legitimate one died in infancy. Lord Egremont was succeeded in the earldom by his nephew George Wyndham, 4th Earl of Egremont (1786-1845), but bequeathed his unentailed estates, namely the former Percy estates including Petworth House in Sussex, Leconfield Castle in Yorkshire and Egremont Castle in Cumbria, to his eldest illegitimate son Col. George Wyndham, 1st Baron Leconfield (5 June 1787 – 18 March 1869). Early life Wyndham was born on 18 December 1751 the eldest son and heir of Charles Wyndham, 2nd Earl of Egremont (1710-1763) of Orchard Wyndham and Petworth House, by his wife Hon. Alicia Maria Carpenter, daughter of George Carpenter, 2nd Baron Carpenter of Killaghy, by his wife Elizabeth Petty. In 1763 at the age of 12, he succeeded to his father's titles and estates at Petworth in Sussex, Egremont in Cumbria, Leconfield with further land in Wiltshire and also the large estates at Orchard Wyndham in Somerset, the family's oldest possession. He later inherited the lands of the Earl of Thomond in Ireland. He was educated at Wandsworth and Westminster Schools. In 1774, he added O'Brien to his name on inheriting extensive estates