Over the past years, a lively cooperation has been developed between Catholic and Protestant Missiologists, who have experienced ecumenical discourse as a significant theological enrichment. In a series of ecumenical missiological conferences under the title "Towards an Ecumenical Missiology" theologians from all over the world approach theological topics from their specific regional, and denominational perspectives. This volume reproduces the speeches of the 2022 conference on denominational, regional and ecumenical understandings of missionary spirituality. Reflections on consequences of denominational differences | and similarities & for missiological activities complete a vision of modern, Christian missiology.