![Pope Francis arrives to board his plane as he leaves Istanbul after a three day visit, November 30, 2014. Pope Francis said Islamic militants were carrying out a "profoundly grave sin against Pope Francis arrives to board his plane as he leaves Istanbul after a three day visit, November 30, 2014. Pope Francis said Islamic militants were carrying out a "profoundly grave sin against](https://c8.alamy.com/comp/2CX7YBD/pope-francis-arrives-to-board-his-plane-as-he-leaves-istanbul-after-a-three-day-visit-november-30-2014-pope-francis-said-islamic-militants-were-carrying-out-a-profoundly-grave-sin-against-god-in-syria-and-iraq-calling-on-sunday-for-inter-religious-dialogue-and-action-against-poverty-to-help-end-the-conflicts-there-reutersstoyan-nenov-turkey-tags-politics-religion-2CX7YBD.jpg)
Pope Francis arrives to board his plane as he leaves Istanbul after a three day visit, November 30, 2014. Pope Francis said Islamic militants were carrying out a "profoundly grave sin against
![After Istanbul attack, Pope prays for those who fight 'bloody stain' of terrorism | Catholic News Agency After Istanbul attack, Pope prays for those who fight 'bloody stain' of terrorism | Catholic News Agency](https://www.catholicnewsagency.com/images/Pope_Francis_at_the_Vatican_April_3_2014_Credit_Daniel_Ibez_CNA.jpg?w=670&h=447)
After Istanbul attack, Pope prays for those who fight 'bloody stain' of terrorism | Catholic News Agency
![Pope Benedict XVI visits the Blue Mosque in Istanbul November 30, 2006. The Pope visited Istanbul's Blue Mosque on Thursday and appeared to pray alongside an Islamic cleric during the visit that Pope Benedict XVI visits the Blue Mosque in Istanbul November 30, 2006. The Pope visited Istanbul's Blue Mosque on Thursday and appeared to pray alongside an Islamic cleric during the visit that](https://c8.alamy.com/comp/2D17Y74/pope-benedict-xvi-visits-the-blue-mosque-in-istanbul-november-30-2006-the-pope-visited-istanbuls-blue-mosque-on-thursday-and-appeared-to-pray-alongside-an-islamic-cleric-during-the-visit-that-made-him-only-the-second-roman-catholic-pontiff-to-enter-a-mosque-reuterspatrick-hertzogpool-turkey-2D17Y74.jpg)
Pope Benedict XVI visits the Blue Mosque in Istanbul November 30, 2006. The Pope visited Istanbul's Blue Mosque on Thursday and appeared to pray alongside an Islamic cleric during the visit that
![Pope Francis in Turkey: Homily during Ecumenical Prayer Service in St. George's Patriarchal Church in Phanar (Istanbul) | Salt + Light Media Pope Francis in Turkey: Homily during Ecumenical Prayer Service in St. George's Patriarchal Church in Phanar (Istanbul) | Salt + Light Media](https://saltandlighttv.org/blog/wp-content/uploads/2014/11/Pope_Francis_Turkey1.jpg)
Pope Francis in Turkey: Homily during Ecumenical Prayer Service in St. George's Patriarchal Church in Phanar (Istanbul) | Salt + Light Media
![Pope Benedict XVI speaks to Mustafa Cagrici, Mufti of Istanbul, before his visit to one of the world's most famous and important mosques in Istanbul November 30, 2006. The Pope visited Istanbul's Pope Benedict XVI speaks to Mustafa Cagrici, Mufti of Istanbul, before his visit to one of the world's most famous and important mosques in Istanbul November 30, 2006. The Pope visited Istanbul's](https://c8.alamy.com/comp/2D32RH4/pope-benedict-xvi-speaks-to-mustafa-cagrici-mufti-of-istanbul-before-his-visit-to-one-of-the-worlds-most-famous-and-important-mosques-in-istanbul-november-30-2006-the-pope-visited-istanbuls-famous-blue-mosque-on-thursday-during-his-trip-to-predominantly-muslim-turkey-becoming-only-the-second-roman-catholic-pontiff-ever-to-enter-a-mosque-reuterswolfgang-rattay-turkey-2D32RH4.jpg)
Pope Benedict XVI speaks to Mustafa Cagrici, Mufti of Istanbul, before his visit to one of the world's most famous and important mosques in Istanbul November 30, 2006. The Pope visited Istanbul's
![Opinion: Pope Francis and Patriarch Bartholomew seek religious unity in suffering | World | Breaking news and perspectives from around the globe | DW | 01.12.2014 Opinion: Pope Francis and Patriarch Bartholomew seek religious unity in suffering | World | Breaking news and perspectives from around the globe | DW | 01.12.2014](https://static.dw.com/image/18102256_303.jpg)