The Gunpowder Plot was a failed attempt to blow up England’s King James I (1566-1625) and the Parliament on November 5, 1605. The plot was organized by Robert Catesby (c.1572-1605) in an effort to end the persecution of Roman Catholics by the English government. Catesby and others hoped to replace the country’s Protestant government with Catholic leadership.

https://www.history.com/topics/british-history/gunpowder-plot

The Gunpowder Plot of 1605, in earlier centuries often called the Gunpowder Treason Plot or the Jesuit Treason, was a failed assassination attempt against King James I by a group of provincial English Catholics led by Robert Catesby.

https://en.wikipedia.org/wiki/Gunpowder_Plot

Gunpowder Plot, the conspiracy of English Roman Catholics to blow up Parliament and King James I, his queen, and his eldest son on November 5, 1605. The leader of the plot, Robert Catesby, together with his four coconspirators—Thomas Winter, Thomas Percy, John Wright, and Guy Fawkes—were zealous Roman Catholics angered by James’s refusal to grant more religious toleration to Catholics.

The Jesuits Oswald Tesimond (also known by the alias Father Greenway) and Father Henry Garnet were also cognizant of the plot.

https://www.britannica.com/event/Gunpowder-Plot