From left : Israeli President Shimon Peres, Orthodox Patriarch Bartholomew, Pope Francis and Palestinian President Mahmoud Abbas, leave after a joint peace prayer in the Vatican's gardens on June 8, 2014. The Vatican has defined the meeting between Israeli President Shimon Peres and Israeli President Shimon Peres as an "invocation for peace" but has stressed it will not be an "inter-religious prayer", which would have posed problems for the three faiths. In the Vatican Gardens, the prayers will be recited in chronological order of the world's three main monotheistic religions, starting with Judaism, followed by Christianity and then Islam. AFP PHOTO POOL / MAX ROSSI