Pope Francis (L) welcomes Palestinian leader Mahmud Abbas as he arrives for a joint peace prayer with Israeli President on June 8, 2014 at the Vatican. 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 / RICCARDO DE LUCA