The Palace of Westminster is one of the world's most famous buildings: 'the mother of parliaments'. Since the days of Simon de Montfort parliaments having been meeting at this location in the heart of London. Though plagued by controversy and destruction over its long history the site's significance endures to this day and remains a keystone of British democracy. In this programme Dan Snow looks back at some of the greatest and most important speeches made over the past 4 centuries in the House of Commons Chamber and its predecessors.