Planned the Gunpowder plot aimed at overthrowing the Parliament with explosives placed in the foundations of the building and assassinate King James I of England , his family and the rest of the House of Lords. He was the key : should detonate the explosives when parliamentarians were gathered . He was finally arrested on November 5, 1605
The palace contains over a thousand rooms , the most important relating to the Halls of the House of Lords and House of Commons. The palace also includes meeting rooms , libraries , halls , dining rooms, bars and gyms. where important state ceremonies , of which the most important is the Opening Ceremony of the Parliament are held.