Week of Prayer for Christian Unity

What were some of the important historical antecedents to this octave of prayer? Certainly in the 19th century, the desire for Christians to pray together was part of the spirit of the age among those alarmed by the divisions which weakened the power of Christian witness. In 1846, for instance, the Evangelical Alliance was established in London and had developed both international and inter-church connections. Ruth Rouse noted that it was “the one and only definitely ecumenical organization . . . which arose out of the Evangelical Awakening in the 19th century” (A History of the Ecumenical Movement: 1517-1948). The concept of unity espoused in their constitution was union among Christian individuals of different churches for renewal in the Spirit; they would not deal with the question of the reunion of churches. The Alliance set aside one week beginning on the first Sunday of the year, for united prayer by members of different churches to pray for renewal in the Spirit.

Source: Rev. Thomas Orians, S.A.  -  "BACKGROUND: Brief History of the Week of Prayer for Christian Unity 2017", by Rev. Thomas Orians, S.A., Associate Director of Graymoor Ecumenical & Interreligious Institute, http://geii.org/week_of_prayer_for_christian_unity/background/brief_history.html