The World Council of Churches (WCC) is a worldwide Christian inter-church organization founded in 1948 to work for the cause of ecumenism. Its full members today include the Assyrian Church of the East, most jurisdictions of the Eastern Orthodox Church (including the Ecumenical Patriarchate of Constantinople), the Oriental Orthodox Churches, the Union of Utrecht, the Lutheran World Federation, the Anglican Communion, the Mennonite churches, the World Methodist Council, the Baptist World Alliance, the World Communion of Reformed Churches, the Moravian Church, the Malankara Mar Thoma Syrian Church, and several Pentecostal churches (but not the Pentecostal World Fellowship or the Assemblies of God). The Catholic Church is not a full member, but it sends delegates who have observer status to meetings.

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