In Western philosophy, the spread of Christianity through the Roman Empire marked the ending of Hellenistic philosophy and ushered in the beginnings of Medieval philosophy, whereas in Eastern philosophy, the spread of Islam through the Arab Empire marked the end of Old Iranian philosophy and ushered in the beginnings of early Islamic philosophy.

Ousia is essence or being, in Eastern Christianity, and is the aspect of God that is completely incomprehensible to mankind and human perception.

Saint Alcuin ( Alcuin of York ) is considered as a saint by all the main branches of Christianity: Roman Catholic, Anglican and Eastern Orthodox Churches.

While the Society was oriented toward an Eastern and especially Indian approach, Steiner was trying to develop a path that embraced Christianity and natural science.

Athanasius is venerated as a Christian saint, whose feast day is 2 May in Western Christianity, 15 May in the Coptic Orthodox Church, and 18 January in the other Eastern Orthodox Churches.

His other important works include his Letters to Serapion, which dealt with the divinity of the Holy Spirit, and his classic Life of St Anthony, which was translated into several languages and played an important role in the spreading of the ascetic ideal in Eastern and Western Christianity.

Other vestments and insignia vary between Eastern and Western Christianity.

* Holy water in Eastern Christianity

Saint Bruno of Querfurt ( c. 974 – February 14, 1009 ), also known as Brun and Boniface, is a sainted missionary bishop and martyr, who was beheaded near the border of Kievan Rus and Lithuania while trying to spread Christianity in Eastern Europe.

Worldwide the three largest groups of Christianity are the Roman Catholic Church, the Eastern Orthodox Church, and the various denominations of Protestantism.

An Eastern Christianity | Eastern Christian Icon depicting Constantine I and Christianity | Emperor Constantine and the Fathers of the First Council of Nicaea ( 325 ) as holding the Niceno – Constantinopolitan Creed of 381.

The three primary divisions of Christianity are Catholicism, Eastern Orthodoxy, and Protestantism.

Another distinction that is sometimes drawn is between Eastern Christianity and Western Christianity.

Like the Roman Catholic Church, the Eastern Orthodox Church also traces its heritage to the foundation of Christianity through Apostolic succession and has an episcopal structure, though the autonomy of the individual, mostly national churches is emphasized.

Eastern Orthodoxy is the second largest single denomination in Christianity, with over 200 million adherents.

Eastern Orthodox Christianity does not officially condemn or endorse capital punishment.

Clement is regarded as a Church Father, and he is venerated as a saint in Orthodox Christianity, Eastern Catholicism and Anglicanism.

Like many of the Eastern Fathers, he has an essentially moralistic conception of Christianity.

Some Christian denominations hold that salvation depends upon transformational faith in Jesus, which expresses itself in good works as a testament ( or witness ) to ones faith for others to see ( primarily Eastern Orthodox Christianity and Roman Catholicism ), while others ( including most Protestants ) hold that faith alone is necessary for salvation.

Eastern Orthodox Christianity emphasizes a continuing life of repentance or metanoia, which includes an increasing improvement in thought, belief and action.

Deuterocanonical books is a term used since the sixteenth century in the Catholic Church and Eastern Christianity to describe certain books and passages of the Christian Old Testament that are not part of the Hebrew Bible.

Each year, the Eastern Orthodox Church celebrates the anniversary of the consecration of the Church of the Resurrection ( Holy Sepulchre ) on September 13 ( for those churches which follow the traditional Julian calendar, September 13 currently falls on September 26 of the modern Gregorian calendar ).

The Eastern Orthodox Church celebrates the feast on 29 December.

The Roman Catholic Church celebrates his feast day on February 13, while the Eastern Christianity celebrates it on March 8.

The Eastern Orthodox Church celebrates Philip's feast day on 14 November.

The Eastern Orthodox Church celebrates Saint Joseph on the Sunday after Christmas.

The Orthodox Church celebrates the Synaxis of the Archangel Michael and the Other Bodiless Powers on November 8 of Stencyl the Eastern Orthodox liturgical calendar ( for those churches which follow the Julian Calendar, November 8 falls on November 21 of the modern Gregorian Calendar ).

The Eastern Orthodox Church celebrates the Holy Maccabean Martyrs on August 1, the first day of the Dormition Fast.

Saint Basil died on January 1, and the Eastern Orthodox Church celebrates his feast day together with that of the Feast of the Circumcision on that day.

The Eastern Orthodox Church knows Margaret as Saint Marina, and celebrates her feast day on July 17.

On the same day the Eastern Orthodox church celebrates the day of John the Baptist and the rites and traditions of both holidays are often mixed.

The Coptic Orthodox Church celebrates the feast of Frumentius on December 18, the Eastern Orthodox on November 30, and the Roman Catholic on October 27.

The Eastern Orthodox Church celebrates it on November 21 as one of its twelve Great Feasts.

During this time, many celebrated travellors from Europe used the Eastern, dining in the station enroute, such as the literary celebrates Hans Christian Andersen, Ramalho Ortigão, Eça de Queiroz, Alberto Pimentel, Luísa de Freitas Lomelino and Eduardo Meneres.

In the Orthodox and Eastern Catholic Churches, Easter eggs are dyed red to represent the blood of Christ, shed on the Cross, and the hard shell of the egg symbolized the sealed Tomb of Christ — the cracking of which symbolized his resurrection from the dead.

In Egypt, it's a tradition to decorate boiled eggs during Sham el-Nessim holiday, which falls every year after the Eastern Christian Easter.

While the origin of Easter eggs can be explained in the symbolic terms described above, a sacred tradition among followers of Eastern Christianity says that Mary Magdalene was bringing cooked eggs to share with the other women at the tomb of Jesus, and the eggs in her basket miraculously turned brilliant red when she saw the risen Christ. The egg represents the boulder of the tomb of Jesus.

Eastern Christianity bases its calculations on the Julian calendar whose 21 March corresponds, during the 21st century, to 3 April in the Gregorian calendar, in which the celebration of Easter therefore varies between 4 April and 8 May.

Easter therefore varies between 4 April and 8 May on the Gregorian calendar ( the Julian calendar is no longer used as the civil calendar of the countries where Eastern Christian traditions predominate ).

Since 1582, when the Catholic Church adopted the Gregorian calendar while the Eastern Orthodox and most Oriental Orthodox Churches retained the Julian calendar, the date on which Easter is celebrated has again differed.

On Easter Day 2007, it was estimated that many of the two billion Catholic, Anglican, Protestant and Eastern Orthodox Christians who were sharing in the celebration of Easter would read, recite, or sing the short prayer in hundreds of languages.

* Triodion – the period of 70 days before Easter ( Eastern and Oriental Orthodox, Greek-Catholic )

* Saturday of Souls – 57 days before Easter ( Eastern and Oriental Orthodox, Greek-Catholic )

* Triumph of Orthodoxy – 42 days before Easter ( Eastern and Oriental Orthodox, Greek-Catholic )

* Lazarus Saturday – 8 days before Easter ( Eastern and Oriental Orthodox, Greek-Catholic )

* Radonitsa – 8 or 9 days after Easter ( Eastern Orthodox )

* All Saints ' Day – 56 days after Easter ( Eastern and Oriental Orthodox, Greek-Catholic ), but in the West this feast is fixed on November 1

St. Mary of Bethany is commemorated in the Eastern Orthodox and Eastern Catholic Churches with her sister Martha on June 4, as well as on the Sunday of the Myrrhbearers ( the Third Sunday of Pascha, i. e. the Third Sunday of Easter ).

The Eastern Orthodox Church liturgical calendar begins on 1 September – proceeding annually from the Nativity of the Theotokos to the celebration of Jesus ' birth in the winter ( Christmas ), through his death and resurrection in the spring ( Pascha / Easter ), to his Ascension and the Assumption of his mother ( Dormition of the Theotokos / Virgin Mary ) in the summer.

While some Eastern Orthodox national churches have accepted the Gregorian calendar dates for feast days that occur on the same date every year, the dates of all movable feasts ( such as Easter ) are still calculated in the Eastern Orthodox churches by reference to the Julian calendar.

Before his elevation to the Roman episcopacy, a difference in dating the celebration of the Christian Passover / Easter between Rome and the bishops of Asia Minor had been tolerated by both the Roman and Eastern churches.

However, all Eastern Orthodox churches rejected this rule and continue to use the Julian calendar to determine the date of Easter ( except for the Finnish Orthodox Church and the Estonian Orthodox Church which now use the Gregorian Easter ).

# The Eastern and Western Christian churches calculate Pascha using two different calendars ( Julian and Gregorian, respectively ); hence in most years Easter is celebrated on a different date in the East and the West.

In 1977, some Eastern Orthodox representatives objected to separating the date of Easter from lunar phases.