Francis, addressing tourists and Romans today in St Peter's Square, recalled those suffering in the Middle East such as Muslims, Christians and minorities like the Yazidis who are victims of "tragic violence and discrimination."
He recalled his return a day earlier from the shrine dedicated to the Virgin Mary in Fatima, Portugal, where many pray for peace.
Francis said that "today, there is so much need for prayer and penitence to implore the grace of conversion, to implore the ends of so many wars" that are "ever-widening."