Iraqi Christian children, who fled the violence in the Nineveh province, attend a mass with their mothers at a chuch in Dekwaneh, east of the Lebanese capital Beirut on March 21, 2015. (ANWAR AMRO/AFP/Getty Images)
The graffiti tagged on the wall of a house in the Iraqi city of Mosul, July 26, 2014. It reads in Arabic : 'Real estate property of the Islamic State (IS)'. (AFP/Getty Images)
The Trevi fountain is illuminated in red to symbolize blood of persecuted Christians around the world, on April 29, 2016 in Rome. (GABRIEL BOUYS/AFP/Getty Images)