In response, on 12 June 2015, Catholic Pope Francis remarked to the International Catholic Charismatic Renewal Services 3rd World Retreat of Priests at the Basilica of Saint John Lateran in Rome that "we have to come to an agreement" for a common date on Easter. , an historian, writing in the Vatican daily newspaper "L'Osservatore Romano", said the Pope is offering this initiative to change the date of Easter "as a gift of unity with the other Christian churches" adding that a common date for Easter would encourage "reconciliation between the Christian churches and …a sort of making sense out of the calendar". A week later Aphrem II, the Syriac Orthodox Patriarch of Antioch, met with Pope Francis and noted that the celebration of Easter "on two different dates is a source of great discomfort and weakens the common witness of the church in the world."