From the article text:
Benedict proposed the encounter as part of his official response to an open letter sent to him and other Christian leaders in October by 138 Muslim scholars from around the world. The letter urged Christians and Muslims to develop their common ground of belief in one God....
The agenda, he said, would cover three main topics: respect for the dignity of each person, interreligious dialogue based on reciprocal understanding, and instruction of tolerance among the young.
Sr. Marie, pray for us as we join the Holy Father and the Muslim delegates who will visit him to pray for peace. "Peace to men of good will!"