Saturday will be a day like none other in Vatican history. It begins with a consistory for new cardinals in the morning — always a big event in Rome, but a regular occurrence. The same day in the afternoon, however, will be an ecumenical meeting to pray together ahead of the Synod on Synodality. Indeed, the event is entitled “Together — Gathering of God’s People.” It will include both Ecumenical Patriarch Bartholomew I of Constantinople, the head of Orthodoxy, and Archbishop of Canterbury Justin Welby, the head of the Anglican Communion…