The first-of-their-kind dialogues – which will kick off in July – will begin with theological discussions but seek practical results. Yet they're stirring some debate within the faith groups as to the proper way to engage "the other" and whether common ground can be found.

The initiative was sparked last October by "A Common Word Between Us and You," an open letter from 138 Muslim clergy and scholars from more than 40 nations to the leaders of all the world's major Christian churches. Concerned that "the future of the world depends on peace between Muslims and Christians," the Muslim leaders proposed dialogue on the basis of the shared principles of "the love of God, and love of the neighbor."