Five-hundred years ago, in a remote part of Germany, a little known friar called Martin Luther set in train a series of events that led to the permanent splintering of Western Christianity. It changed the political and social landscape in a way that still resonates today all over the world. The Forum comes from Trinity Hall, part of Cambridge University in the UK, with historian professor Ulinka Rublack, professor of English Literature Brian Cummings, professor of Theology Alec Ryrie and the Reverend Daniel Jeyaraj. The British actor Simon Russell Beale reads from Luther's writings and members of the Cambridge University Choir of Gonville and Caius College perform Lutheran hymns. (Photo: A Statue of Martin Luther in Eisenach, Germany. Credit: Getty Images)