The Gunpowder Plot was a failed attempt in 1605 by English Catholics led by Robert Catesby to blow up the English Parliament and kill King James I, in protest of the persecution of Catholics. Guy Fawkes was discovered in the cellar of Parliament with barrels of gunpowder the night before the planned attack. Fawkes and the other conspirators were arrested, tortured, tried for treason, and executed. November 5th became a national holiday in Britain commemorating the plot's discovery.