The principal contributions were:
- Bishop Kallistos of Diokleia, Ecumenical Patriarchate
- Archimandrite Serge Kelleher, Melkite Greek Catholic Patriarchate of Antioch
- Edward Cardinal Cassidy, Pontifical Council for Christian Unity
- Professor David Melling, Professor of Classics, University of Manchester
- Archimandrite Ephrem Lash, Archdiocese of Thyateira and Great Britain
- Dom Michael van Parys, former Abbot of Chevetogne, Oriental Congregation, Rome