What if for the Feast of St. Andrew (patron of Constantinople), the Pope had restored the Patriarchate of Constantinople? By appointing a Catholic as Patriarch, that is what Pope Leo XIII did for the venerable Church of St. Mark in Alexandria: "We ... from the plenitude of apostolic power restore the Catholic Patriarchate of Alexandria and establish it for the Copts. ... To us it is most desired that the dissenting Copts look upon the Catholic Hierarchy in truth before God; that is to say the hierarchy which on account of communion with the Chair of Peter and his successors alone can legitimately restore the Church founded by St. Mark, and alone is heir of the entire memory, whatever has been faithfully handed on to the Alexandrian Patriarchate from those ancient forebears." (Acta Sanctae Sedis 28, p. 257-260, anno 1895-1896)Read the rest here.
Some of the comments are quite revealing.