The Eastern Orthodox Church has always considered the Roman Catholic Chrurch the "Church of Rome," and all the "rites" associated with His Holiness the Pope of Rome, not-with-standing the regions of its geographic embrace. And much of the Orthodox Church acceopts its claim to universal (Catholic) jurisdiction, and the Orthodox consept that its teachings embrace all matters Catholic
Eastern Orthodox? East of what?
If the Roman Catholic Church gets their title, I demand my church be called the Orthodox Catholic Church, or just the Orthodox Church. You know, it's ACTUAL name.
No doubt, the Orthodox Church is the Orthodox Catholic Church; the Ecumenical Synods of the first millennium refer to the Church as both the Orthodox Church and the Catholic Church.
But, the Orthodox Church is the Church of the East; it was founded on Earth in Jerusalem, thus, our church altar's face East; from Alexandria to Moscow, the Orthodox Church is the Church of the East, though it is Catholic and is "in all the world."
Use of the preface "Eastern" is a reaction to the 17th century or so practice initiated by the revolutionary movements of the Orthodox who were under Ottoman suppression and began use of their ethnicity in connection with their Orthodox Churches, i.e. Romanian, Bulgarian, Greek, etc., to promote their ethnicity, their individuality within the Ottoman Empire. The Church's use of Eastern was a manner of demonstrating the oneness of the Orthodox Churches. Somewhere at the Ecumenical Patriarchate, there is an old sign that states in Greek "Anatolikien Orthodoxie Ecclesia," "Eastern [or Anatolian, Oriental] Orthodox Church." But as Fr. John Meyendorff has written, ask any Orthodox Christians in these areas to which religion they adhere, the answer in their ethnic tong is "I am Orthodox."
Note too, the Orthodox Church is as much "Apostolic" as it is "Catholic."
I do not take issue with a parish referring to itself as "Orthodox Catholic," because it is both "Orthodox" and "Catholic," but our Church is the "Eastern Orthodox Christian Church."