The parents of the First Ecumenical Council (325) reading of the Creed. Between the eighth and eleventh centuries saw the final maturation of the Greek Orthodox Church around the figure of the patriarch of Constantinople. The other Eastern patriarchs recognized at the Council of Chalcedon in 451 (Alexandria, Antioch, Jerusalem), had lost their importance to be subjected to Islamic rule in the territories, and relations with Rome were distant, though still popular, being located such city from the Byzantine perspective, on the outskirts of the civilized world. Orthodox cross. The inclined cross symbolizes the raised part of the “Good Thief” and in its lower part to the “Bad Thief.” The Pope seemed more attentive to what was happening in the new Western Christianity, but still, for the duration of imperial rule in the Exarchate of Ravenna, several popes were Greek or Syrian origin.Most popes precism ticos considered holy by the Roman Catholic Church also remain for the Orthodox Church, for example, Clement I, Martin I, Agapito I, etc. The Eastern bishops recognized the bishop of Rome a primacy of honor but he understood that the doctrinal and disciplinary decisions should be taken by the Patriarchs jointly or in a general council, ecumenical, and never abandoned the essence of this view, incompatible with the rise of Roman primacy and its development since the second half of the eighth century.Roma, meanwhile, was unwilling to accept the imperial rivalry was subject to the church in the Byzantine Empire with its idea of “symphony” between the power of the Emperor and the Patriarch, only by understanding this diversity of views is can understand the reasons that ended up separating the two churches, more, even, that their differences of dogma and liturgical use, but through them demonstrating different ways of understanding religion: the use of different languages, liturgical calendars and partly , specific saints, especially sensitive about the worship of icons, fees are also different. A good example of that, are the records of Quinisext Council (AD 692), which the Pope of Rome refused to approve, but their legacies in Constantinople was signed, but both are “one of the essential foundations of the Byzantine canon law” ( Ducellier) on important issues, such as clerical celibacy.In fact, recent ecumenical councils were held in the East and those who were present were the Pope’s legacy of Nicaea in 787 and Constantinople in 869. After the break is stanched produced by the confrontation between the Patriarch of Constantinople Photius and Pope Nicholas I. Thereafter, the Byzantine Church and those that were created from it were organized by their own councils or synods.