The concept “ecumenism” has had different meanings over the history of the church. It has become firmly attached now to the modern movement, begun in 1910 in Edinburgh, concerned with the unity of Christians for the sake of the mission of the church to the world. At the turn of the 21st century, both “ecumenism” and “ecumenical movement” refer primarily to the multidimensional movement of churches and Christians whose goal is both the visible unity of the churches and an integration of mission, service, and renewal.