The official Christian delegates included Patriarch Bartholomew I of Constantinople, Archbishop Rowan Williams of Canterbury, Archbishop Norvan Zakaryan of the Armenian Apostolic Church, Secretary General Olav Fyske Tveit of the World Council of Churches.
In all, there were representatives of the Orthodox Churches from the Patriarchates of Constantinople, Alexandria, Antioch, Moscow, Serbia, Romania, and the Ukrainian, Belarusian, Cypriot, Polish and Albanian churches. The Oriental Orthodox were represented by the Syrian Patriarchate of Antioch, the Armenian Apostolic Church (both Catholicossates) and the Malankara Orthodox Syrian Church. The Assyrian Church of the East was represented by the Metropolitan of India, the bishop of California and a priest.
The Anglican Communion, the Old Catholic Church, Lutheran World Federation, World Communion of Reformed Churches, the World Methodist Council, the Baptist World Alliance, World Convention of the Churches of Christ, the Mennonite World Conference, the World Evangelical Alliance, and the World Council of Churches were all represented, along with the Church of Scotland, the Disciples of Christ, the Salvation Army, and the classical Pentecostal churches.
176 representatives of non-Christian religions were present, including Reform and Orthodox Judaism; Sunni, Shi’a, Alawite and Ismaili Muslims; Hinduism (including Rajmohan Gandhi, grandson of the Mahatma); Jainism; Zoroastrianism; Buddhism (including Shaolin, Zen, Tibetan, Theravada, Tendai, Jogye, Jodo-Shu, and other forms); Confucianism; Taoism; Shinto; Mandaean (Gnostics); Sikh; Baha’i; traditional African, American, and Indian Religions; and “new religions” such as Tenrikyo, Ennokyo, and Myochi-kai.
Four “non-believers” were invited, a first, emphasizing Pope Benedict’s interest in the New Evanglization and his effort to engage secularism and religion on a level of common interest in the quest for truth. These included Julia Kristeva, Bulgarian-French psychoanalyst; Guillermo Hurtado, the Mexican philosopher; Walter Baier, a politician from Austria; and Remo Bodei an Italian professor of Aesthetic and philosophy.