Eastern Orthodoxy

== Liturgy ==

{{Main|Byzantine Rite|Eastern Orthodox worship|Western Rite Orthodoxy}}
[[File:Meister der Sophien-Kathedrale von Ohrid 001.jpg|thumb|[[Fresco]] of [[Basil the Great]], in the church of [[Church of Saint Sophia, Ohrid|Saint Sophia]], [[Ohrid]]. The saint is shown [[consecration|consecrating]] the [[Sacred Mysteries|Gifts]] during the [[Divine Liturgy]] which bears his name.|282x282px]]

=== Church calendar ===

Lesser cycles also run in tandem with the annual ones. A weekly cycle of days prescribes a specific focus for each day in addition to others that may be observed:<ref>{{cite web |title=The Five Cycles |work=Orthodox Worship |publisher=The Diocese of Eastern Pennsylvania, Orthodox Church in America |url=http://doepa.org/about_orthodoxy.html |access-date=24 June 2015 |archive-date=13 July 2015 |archive-url=https://web.archive.org/web/20150713125935/http://doepa.org/about_orthodoxy.html |url-status=live }}</ref>{{blockquote|text=Each day of the Weekly Cycle is dedicated to certain special memorials. Sunday is dedicated to [[Resurrection of Jesus|Christ's Resurrection]]; Monday honors the holy bodiless powers (angels, archangels, etc.); Tuesday is dedicated to the prophets and especially the greatest of the prophets, [[John the Baptist|St. John the Forerunner and Baptist of the Lord]]; Wednesday is consecrated to the Cross and recalls Judas' betrayal; Thursday honors the holy apostles and hierarchs, especially [[Saint Nicholas|St. Nicholas, Bishop of Myra in Lycia]]; Friday is also consecrated to the Cross and recalls the day of the Crucifixion; Saturday is dedicated to All Saints, especially the [[Theotokos|Mother of God]], and to the memory of all those who have departed this life in the hope of resurrection and eternal life.}}

=== Church services ===

{{Main|Canonical hours#Byzantine Rite usage}}
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==== Music and chanting ====

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[[File:Patriarchate Constantinopolis.jpg|thumb|Chanters singing on the [[kliros]] at the [[Church of St. George, Istanbul|Church of St. George]], [[Patriarchate of Constantinople]]]]

For the composition of religious chant, the [[Octoechos]], an eight-[[Mode (music)|tone (mode)]] system, analogous to the [[Gregorian mode]]s in the West, and to other ancient Christian musical systems, is used. [[Byzantine music]] is [[Microtonal music|microtonal]].

Northern Slavs, however, have used simpler tonal systems evolved through the sundry local types of [[Znamenny chant]]; today [[Western culture#Music|Western music]], often with [[four-part harmony]], and the "tones" are simply sets of melodies.

There are numerous versions and styles that are traditional and acceptable and these vary a great deal between cultures.{{sfn|Ware|1993|p=238}}