Robert Catesby ( – 8 November 1605) was the leader of a group of English Catholics who planned the failed Gunpowder Plot of 1605. Born in Warwickshire, Catesby was educated at Oxford University. His family were prominent recusant Catholics, and presumably to avoid swearing the Oath of Supremacy he left college before taking his degree. He married a Protestant in 1593 and fathered two children, one of whom survived birth and was baptised in a Protestant church. In 1601 he took part in the Essex Rebellion but was captured and fined, after which he sold his estate at Chastleton. Wikipedia