Eastern Orthodox Church
The Orthodox Church is an international federation of patriarchal, autocephalous and autonomous churches. Each church is independent in her internal organization and follows her own particular customs. However, all the churches are united in the same faith and order.
The Orthodox Church acknowledges that unity does not mean uniformity. Each Church is led by a synod of bishops. Among the various bishops, the Ecumenical Patriarch of Constantinople is accorded a "place of honor" and is regarded as "first among equals."
In America and Western Europe there are a number of dioceses and archdioceses which are directly linked to one of these autocephalous Churches. For example, the Greek Orthodox Archdiocese is under the care of the Patriarchate of Constantinople.
THE GREAT SCHISM
The Great Schism is the title given to separation between the Western Church (the Roman Catholic) and the Eastern Church, (the Orthodox), which took place in the eleventh century.
By the ninth century legitimate differences were intensified by political circumstances, cultural clashes, papal claims, and the introduction in the West of the Filioque phrase into the Nicene Creed. The Filioque affirms that the Holy Spirit proceeds from the Father and the Son. Both the papal claims and the Filioque were strongly repudiated by the East.
The Crusades can be considered the final element in the process of estrangement and deepening mistrust. Although there were attempts to restore communion in the years 1274 and 1439, there was no lasting unity achieved.
(formed about 1054) A church that split from the Roman Catholic Church (no submission to pope) in the Great Schism; allow their clergy to marry.