129 The Gunpowder Treason - One Minute History

In 1605, English Catholic revolutionaries plotted to assassinate King James I by blowing up the House of Lords during the opening of Parliament. They smuggled gunpowder into a cellar beneath Westminster. The plot was revealed by an anonymous letter, leading to the arrest of Guy Fawkes. After being tortured, Fawkes revealed his co-conspirators, who were executed. The event is commemorated annually, with searches of the cellars beneath Parliament and the phrase 'Remember, remember the 5th of November.'

What is the significance of the cellars below the House of Parliament?

What is remembered on the 5th of November?