Byzantine Rite

The Byzantine Rite, also known as the Greek Rite or the Rite of Constantinople, is a liturgical rite that is identified with the wide range of cultural, devotional, and canonical practices that developed in the Eastern Christian church of Constantinople.

The canonical hours are extended and complex, lasting about eight hours (longer during Great Lent) but are abridged outside of large monasteries. An iconostasis, a partition covered with icons, separates the area around the altar from the nave. The sign of the cross, accompanied by bowing, is made very frequently, e.g., more than a hundred times during the divine liturgy, and there is prominent veneration of icons, a general acceptance of the congregants freely moving within the church and interacting with each other, and distinctive traditions of liturgical chanting.

Some traditional practices are falling out of use in modern times in sundry churches and in the diaspora, e.g., the faithful standing during services, bowing and prostrating frequently, and priests, deacons, and monastics always wearing a cassock and other clerical garb even in everyday life (monastics also sleep wearing a cassock) and not shaving or trimming their hair or beards.

In addition to numerous psalms read every day, the entire psalter is read each week, and twice each week during Great Lent, and there are daily readings of other scriptures; also many hymns have quotes from, and references to, the scriptures woven into them. On the numerous fast days there is prescribed abstention from meat and dairy products, and on many fast days also from fish, wine, and the use of oil in cooking. Four fasting seasons are prescribed: Great Lent, Nativity Fast, Apostles' Fast and Dormition Fast. In addition, throughout the year most Wednesdays and Fridays, as well as Mondays in monasteries, are fast days.

In its present form, the rite is the product of a long cultural synthesis that developed in the years after the 8th-9th century Iconoclasm, in which monasteries and their cultural contacts with the Holy Land played a decisive role. From the 9th to the 14th centuries, the influence of the Palestinian Rite exerted a dominating influence and the rite has been called a "hybrid" between an earlier ceremonial rite which scholars have dubbed the cathedral rite of Constantinople, called the asmatiki akolouthia ("sung services") and the Palestinian Rite of Jerusalem, the Hagiopolitan (Gr. "of the Holy City") in Greek, chiefly through the monastic typikon of the Mar Saba monastery near Jerusalem. Later developments were usually connected to monasteries at Constantinople and Mount Athos patronized by the imperial court, such as Studion, whose Rule formed the nucleus of early monastic communities in Bulgaria and Kievan Rus'. In the early modern period, the traditions of the rite received further elaboration from the interface of Christian and Islamic mystical traditions fostered in the Ottoman court.

By the mid-17th century, the practices of the Russian Church differed to those of other Orthodox Christians, who followed contemporary Greek practices. Patriarch Nikon made efforts to correct the translations of texts and institute liturgical reforms so that they were aligned with Greek practices. Nikon's reforms were not accepted by all, and the resulting schism (Raskol) split Russian Christianity into the present Russian Orthodox Church and the historically persecuted Old Believers, who maintained many archaic practices of worship.

The "Holy Mysteries", or "Sacred Mysteries", or similar, refer to the elements of Holy Communion, the real presence of Christ in the Eucharist, in the texts of the Divine Liturgy, the prayers before and after communion, and elsewhere, as, for example, in the first petition of the ectenia after communion, "Arise! Having partaken of the divine, holy, pure, immortal, heavenly, life-creating, and awesome Mysteries of Christ, let us worthily give thanks to the Lord."

Also termed the sacred mysteries is a broad theological category including the seven sacraments defined in the Western Church but differing slightly in emphasis—stressing their ineffable character and forgoing the intense theological definitions which emerged in the centuries following the Reformation. Although all modern Orthodox churches customarily observe the same seven sacraments as in Catholicism, the number has no dogmatic significance and, up to the 17th century, individual authors varied greatly in the number of rites considered "mysteries". Despite the historical differences, modern Orthodox and Catholic faithful are generally united in viewing the West's seven sacraments and Orthodoxy's looser number of sacred mysteries—seven only by convention—as effectively equivalent. The Catholics regard the two as identical.