The Gunpowder Plot was a failed assassination attempt in 1605 led by Guy Fawkes to blow up the English Parliament and kill King James I. Fawkes and other Catholic conspirators rented a cellar beneath Parliament and stored 36 barrels of gunpowder with the plan to detonate it during the state opening of Parliament. However, they were tipped off by an anonymous letter to Lord Monteagle warning him not to attend Parliament that day. Authorities searched the cellar and captured Fawkes, who confessed the names of his co-conspirators under torture. Most of the plotters were killed as they were hunted, while Fawkes and others were tried and executed for high treason.