Lutherans gathering in the eastern German town of Wittenberg have officially launched a decade of celebrations to mark the 500th anniversary of the Protestant Reformation. German Interior Minister Wolfgang Schaeuble told the congregation that he hoped the memorial decade would be a time for Lutherans to try harder to help other faiths, especially Islam, integrate into German society. The break from the Catholic Church began in 1517 when a monk called Martin Luther nailed 95 demands to the door of a church in Wittenberg. The Lutheran World Federation says there are 68 million Lutherans around the world today.