Eastern Orthodox Church

The Eastern Orthodox Church, officially the Orthodox Catholic Church, also referred to as the Orthodox Church, Eastern Orthodoxy, and Orthodoxy, is the second largest Christian Church in the world, with an estimated 225–300 million adherents.

The Eastern Orthodox Church is one of the oldest religious institutions in the world, teaching that it is the One, Holy, Catholic and Apostolic Church established by Jesus Christ in his Great Commission to the apostles, and practicing what it understands to be the original faith passed down from the Apostles.

United in communion with the Latin Church before the East–West Schism in 1054, and with the Oriental churches for the first quarter of its history, Eastern Orthodoxy spread throughout the Roman and later Byzantine Empires and beyond, playing a prominent role in European, Near Eastern, Slavic, and some African cultures. Its most prominent episcopal see is Constantinople.

Eastern Orthodoxy has no Papacy or similar authority, but instead teaches that all bishops are equal by virtue of their ordination, and each autocephalous church is typically governed by a Holy Synod. This is one of the main reasons for the division between the Roman Catholic Church and the Eastern Orthodox Church. The commonly-used but unofficial designation "Eastern" derives from the geographical location of the main centers of Orthodoxy in relation to the "Western" churches (now known as the Roman Catholic Church), and from Constantinople being the capital of the Eastern Roman Empire.

Eastern Orthodox church architecture

An Orthodox church as a church building of Eastern Orthodoxy has a distinct, recognizable family of styles among church architectures. Commonly influenced by the legacy of the Eastern Roman Empire and Byzantine architecture each autocephalous Orthodox church has developed its own building traditions and church architecture styles, that share a cluster of fundamental similarities.

History

While sharing many traditions, East and West in Christianity began to diverge from each other from an early date. Whereas the basilica, a long aisled hall with an apse at one end, was the most common form in the West, a more compact centralised style became predominant in the East. These churches were in origin 'martyria' focused on the tombs of the saints—specifically, the martyrs who had died during the persecutions, which only fully ended with the conversion of the Emperor Constantine. They copied pagan tombs and were roofed over by a dome which symbolised heaven. The central dome was then often surrounded by structures at the four points of the compass producing a cruciform shape - these were themselves often topped by towers or domes. The centralised and basilica structures were sometimes combined as in the church of Hagia Sophia in Constantinople. The basilican east end then allowed for the erection of an iconostasis, a screen on which icons are hung and which conceals the altar from the worshippers except at those points in the liturgy when its doors are opened.