Charles Seymour, 6th Duke of Somerset (13 August 1662 – 2 December 1748), known by the epithet "The Proud Duke", was a British peer. He rebuilt Petworth House in Sussex, the ancient Percy seat inherited from his wife, in the palatial form which survives today. He was a remarkably handsome man, and inordinately fond of taking a conspicuous part in court ceremonial; his vanity, which earned him the sobriquet of "the proud duke," was a byword among his contemporaries and was the subject of numerous anecdotes; Macaulay described him as "a man in whom the pride of birth and rank amounted almost to a disease".