Reformation means change. To remember the beginning of the Reformation 500 years ago means to engage in processes of change, to take up traces of the past which reach into the present and beyond. A theology which reflects the Evangelical origins of Christianity induces changes, a reform of Christianity. Luther's call to reform from 1520 has the programmatic title: 'Open Letter to the Christian Nobility of the German Nation. Concerning the Reform of the Christian Estate'. The reform processes associated religion with reform which leads beyond the context of 16th century up to the present, breaking up internal ecclesial perspectives, the boundaries of confessional institutions and even of Christian religion itself. The contributions of this volume derive from a joint lecture series of the Faculty of Protestant Theology of the University of Bonn and the Ecclesiastical University Wuppertal/Bethel.