Where did Guy Fawkes hide the gunpowder?

Guy Fawkes hid the gunpowder in a cellar beneath the House of Lords in Westminster, London. This was part of the Gunpowder Plot of 1605, a conspiracy to blow up the House of Lords and assassinate King James I. Fawkes and his co-conspirators aimed to ignite the gunpowder during the state opening of Parliament. However, the plot was foiled, and Fawkes was arrested before he could execute the plan.