(01 Dec 09 - RV)Pope Benedict has written a Message to Ecumenical Patriarch Bartholomew I of Constantinople, marking yesterdays Feast of St Andrew. The Message delivered yesterday during the course of a visit to Istanbul by Cardinal Walter Kasper, president of the Pontifical Council for Promoting Christian Unity, outlined role of the Pope and the historical and spiritual definition of the Petrine ministry. Yesterday the Vatican delegation participated in celebrations to mark the feast while later today they will take part in bilateral discussions with representatives of the Ecumenical Patriarch. Lydia O’Kane spoke Cardinal Kasper about the delegation’s activities and the Pope’s Letter.