Non-native Christian communities are largely found in the urban regions of Alexandria and Cairo, and are members of the Greek Orthodox Church of Alexandria, the Melkite Greek Catholic Church, the Armenian Apostolic Church, the Roman Catholic Church, the Episcopal Church in Jerusalem and the Middle East, the Maronite Church, the Armenian Catholic Church, the Chaldean Catholic Church, the Syriac Catholic Church, or the Syriac Orthodox Church.
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The diocese is immediately subject to the Holy See and operates alongside eleven Chaldean dioceses, two Syrian Catholic, one Greek-Melkite, and one Armenian Catholic diocese.
The Eastern Rite tradition was historically associated with the Church of the East, and is currently employed by the Middle Eastern churches that descend from it, the Assyrian Church of the East, Ancient Church of the East, and the Chaldean Catholic Church, (the members of these churches are commonly Eastern Aramaic speaking ethnic Assyrians) as well as by the Syro-Malabar Catholic Church of India.
He refused repeated calls that he be made the Chaldean Catholic Church Bishop of Salamas.
Raphael I Bidawid, patriarch of the Chaldean Catholic Church in 1989–2003
Yahballaha V, Patriarch of the Chaldean Catholic Church from 1572 to 1580