Pope Leo XIV invokes Leo XIII as early champion of ecumenismWhile Leo XIII’s push for Christian unity calls on adherence to Catholic doctrine and papal primacy, Leo XIV emphasizes an approach of ‘legitimate diversity’ rooted in the Nicene Creed.Pope Leo XIV marked the start of the Week of Prayer for Christian Unity by invoking the legacy of Pope Leo XIII, whom he presented as an ecumenical forerunner.On January 18, at the conclusion of the Angelus prayer in St. Peter’s Square at the Vatican, Pope Leo XIV announced the opening of the Week of Prayer for Christian Unity, encouraged Catholics to...