Sir John Vanbrugh (; 24 January 1664 (baptised) – 26 March 1726) was an English architect and dramatist, perhaps best known as the designer of Blenheim Palace and Castle Howard. He wrote two argumentative and outspoken Restoration comedies, The Relapse (1696) and The Provoked Wife (1697), which have become enduring stage favourites but originally occasioned much controversy. He was knighted in 1714.