The terms "Eastern" and "Western" in this regard originated with geographical divisions in Christianity mirroring the cultural divide between the Hellenistic east and Latin West, and the political divide between the Western and Eastern Roman empires. Because the largest church in the East is the body currently known as the Eastern Orthodox Church, the term "Orthodox" is often used in a similar fashion to "Eastern", to refer to specific historical Christian communions. However, strictly speaking, most Christian denominations, whether Eastern or Western, consider themselves to be "orthodox" (following correct beliefs) as well as "catholic" (or "universal"), as two of the Four Marks of the Church listed in the Nicene-Constantinopolitan Creed: "One, Holy, Catholic and Apostolic" (Greek: μία, ἁγία, καθολικὴ καὶ ἀποστολικὴ ἐκκλησία).
There are several liturgical rites in use among the Eastern churches (excepting the non-liturgical dissenting bodies). These are the Alexandrian Rite, the Antiochene Rite, the Armenian Rite, the Byzantine Rite, the East Syriac Rite and the West Syriac Rite.
Eastern Christians do not share the same religious traditions, but do share many cultural traditions. Christianity divided itself in the East during its early centuries both within and outside of the Roman Empire in disputes about Christology and fundamental theology, as well as national divisions (Roman, Persian, etc.). It would be many centuries later that Western Christianity fully split from these traditions as its own communion. Today there are four main branches or families of Eastern Christianity, each of which has distinct theology and dogma:
In many Eastern churches, some parish priests administer the sacrament of chrismation to infants after baptism, and priests are allowed to marry before ordination. While all the Eastern Catholic Churches recognize the authority of the Pope, some of them who have originally been part of the Orthodox Church or Oriental Orthodox Church closely follow the traditions of Orthodoxy or Oriental Orthodoxy, including the tradition of allowing married men to become priests.
The Eastern churches' differences from Western Christianity have as much, if not more, to do with culture, language, and politics, as theology. For the non-Catholic Eastern churches, a definitive date for the commencement of schism cannot usually be given (see East–West Schism). The Church of the East declared independence from the churches of the Roman Empire at its general council in 424, which was before the Council of Ephesus in 431, and so had nothing to do with the theology declared at that Council. Oriental Orthodoxy separated after the Council of Chalcedon in 451.