Mount Athos · Dave Proffer, CC BY 2.0, via Wikimedia Commons

Understanding an Orthodox Christian in 5 minutes

  1. The faith of the apostles, kept whole

    "Orthodox" means both "right belief" and "right glory", or worship. Orthodox Christians believe their church is the same church the apostles founded, guided by the seven ecumenical councils of the first millennium, and that it has kept that faith without adding to it or taking away. Change comes slowly and is weighed against tradition, which Orthodox understand not as dead custom but as the living memory of the church.

    • The Orthodox Church — Timothy Ware, Penguin (1993)
    • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

  2. Heaven on earth in the Liturgy

    For Orthodox Christians, faith is lived above all in worship. The Divine Liturgy, sung rather than spoken, full of incense, candles, bells and ancient chant, is meant to lift people into the worship of heaven. People often stand for hours, come and go, light candles and kiss icons. The chronicle says the envoys of pagan Kyiv found Byzantine worship so beautiful that they "knew not whether we were in heaven or on earth".

    • For the Life of the World: Sacraments and Orthodoxy — Alexander Schmemann, St Vladimir's Seminary Press (1973)
    • The Orthodox Church — Timothy Ware, Penguin (1993)
    • The Russian Primary Chronicle: Laurentian Text — Samuel Hazzard Cross and Olgerd P. Sherbowitz-Wetzor (trans.), Mediaeval Academy of America (1953)

  3. Icons, windows onto heaven

    Icons, painted images of Christ, Mary and the saints, fill every Orthodox church and almost every Orthodox home: in Pew surveys a median of 90% of Orthodox in Central and Eastern Europe keep them. They are not decorations but "windows" through which the faithful meet the holy person shown. Orthodox kiss icons and light lamps before them, insisting this is veneration, not worship, a distinction fought over and won in 843.

    • Orthodox Christianity in the 21st Century — Pew Research Center, Pew Research Center (2017)
    • Imago Dei: The Byzantine Apologia for Icons — Jaroslav Pelikan, Princeton University Press (1990)
    • The Orthodox Church — Timothy Ware, Penguin (1993)

  4. Becoming like God

    At the heart of Orthodox spirituality is *theosis*, "deification": the belief that humans, made in God's image, are called to share in God's own life by grace. As St Athanasius put it, God became human so that we might become God. Prayer, fasting, the sacraments and the struggle against one's passions are all part of this lifelong healing, rather than a legal settling of accounts.

    • The Orthodox Way — Kallistos Ware, St Vladimir's Seminary Press (1979)
    • Byzantine Theology: Historical Trends and Doctrinal Themes — John Meyendorff, Fordham University Press (1974)
    • On the Incarnation of the Word (Nicene and Post-Nicene Fathers, Second Series, vol. 4) — Athanasius of Alexandria; trans. Archibald Robertson, Christian Literature Publishing Co. (1892)

  5. A family of national churches

    Orthodoxy has no pope. It is a communion of self-governing (autocephalous) churches, Greek, Russian, Serbian, Romanian, Georgian and others, with the Ecumenical Patriarch of Constantinople honoured as "first among equals". Alongside them stand the Oriental Orthodox churches of Egypt, Ethiopia, Armenia, Syria and India, separated since 451. Faith and nation are tightly bound, which gives deep roots and sometimes bitter quarrels.

    • The Orthodox Church — Timothy Ware, Penguin (1993)
    • An Introduction to the Christian Orthodox Churches — John Binns, Cambridge University Press (2002)
    • Orthodox Christianity in the 21st Century — Pew Research Center, Pew Research Center (2017)

  6. A church that has lived through captivity

    Few Christians have suffered as much at the hands of empires. Orthodox lived for centuries under Ottoman rule, saw their holiest city sacked by Western crusaders, and in the twentieth century endured the most systematic attempt ever made to wipe out a church, in the Soviet Union. That memory of martyrdom and survival shapes a faith that is patient, proud and often wary of outsiders.

    • The Great Church in Captivity — Steven Runciman, Cambridge University Press (1968)
    • The Russian Church under the Soviet Regime, 1917–1982 — Dimitry Pospielovsky, St Vladimir's Seminary Press (1984)
    • The Fourth Crusade and the Sack of Constantinople — Jonathan Phillips, Jonathan Cape (2004)

The story

Deep roots. Orthodox Christians trace their church to Pentecost in Jerusalem and to the apostles who preached across the Greek-speaking East: Paul in Greece and Asia Minor, Mark in Alexandria, Peter in Antioch, and, by tradition, Andrew on the shores of the Black Sea. The New Testament was written in Greek, and the first great centres of Christianity, Jerusalem, Antioch and Alexandria, were in the East. When Constantine moved the capital of the Roman Empire to Constantinople in 330, the "New Rome" became the heart of a Christian empire that we call Byzantine but whose people called themselves Romans, and its church carried that heritage north to the Slavs.

New Rome & the councils

313 – 842
325 (with later councils to 451) faithscripture

The Council of Nicaea and the creed

Bishops called by Constantine meet at Nicaea to settle whether Jesus is truly God, producing the core of the creed Catholics still recite every Sunday.

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★ Why it matters today

Orthodox Christians call themselves the church of the seven ecumenical councils, and Nicaea is the first. They recite the creed of Nicaea and Constantinople at every Divine Liturgy without the Western "filioque", and keep Constantine and his mother Helena as saints "equal to the apostles". Many still celebrate Easter by the Julian calendar, partly out of loyalty to the early church's reckoning.

What happened

In the early fourth century an Alexandrian priest named Arius taught that the Son of God was created by the Father and so was not fully God. The dispute split the eastern church, and in 325 Constantine summoned bishops, traditionally numbered at 318, to Nicaea, near his capital.

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Well established
451 faithidentity

Chalcedon and the Oriental Orthodox churches

The Council of Chalcedon defines Christ as one person "in two natures", and the churches of Egypt, Ethiopia, Armenia and much of Syria refuse it, creating the oldest lasting division in Christianity.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • An Introduction to the Christian Orthodox Churches — John Binns, Cambridge University Press (2002)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)
  • A History of Christianity: The First Three Thousand Years — Diarmaid MacCulloch, Allen Lane (2009)

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★ Why it matters today

"Orthodox" covers two families that are not in communion with each other: the Eastern Orthodox (Greek, Russian, Serbian and others) and the Oriental Orthodox (Coptic, Ethiopian, Eritrean, Armenian, Syriac and Indian Malankara churches). They look alike in worship and spirit, and since the 1960s theologians on both sides have said the old quarrel was largely about words, but full reunion has not come.

What happened

By the fifth century Christians agreed that Jesus was fully God, as Nicaea had said, and fully human. The hard question was how the two belonged together. In 451 several hundred bishops met at Chalcedon, across the Bosphorus from Constantinople, under the eye of the emperor Marcian, and defined Christ as one person "in two natures".

How it's seen
Eastern Orthodox view

Chalcedon is the fourth of the seven ecumenical councils, and its formula, one Christ "in two natures, without confusion, without change, without division, without separation", guards both his full divinity and his full humanity.

Oriental Orthodox view

Following Cyril of Alexandria, Christ has "one incarnate nature of God the Word", divine and human united without mixture.

Read the full story · 1 min
Well established
27 December 537 faithartempire

Justinian's Hagia Sophia

Emperor Justinian dedicates the Great Church of Holy Wisdom in Constantinople, for nearly a thousand years the heart of Orthodox worship.

  • Byzantium: The Surprising Life of a Medieval Empire — Judith Herrin, Allen Lane (2007)
  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Orthodox Church in the Byzantine Empire — J. M. Hussey, Oxford University Press (1986)

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★ Why it matters today

Hagia Sophia is still the symbol of Byzantine Orthodoxy, the church whose beauty, according to the chronicle, won the Rus' to the faith. Its conversion to a mosque in 1453, its time as a museum and its reconversion in 2020 are felt by Orthodox Christians everywhere as part of their own story.

What happened

After riots burned the old cathedral in 532, Emperor Justinian had it rebuilt in under six years by the architects Anthemius of Tralles and Isidore of Miletus. Its vast dome seemed, as the court historian Procopius wrote, to hang from heaven.

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Well established
c. 730–843 faithartpolitics

Iconoclasm and the Triumph of Orthodoxy

Byzantine emperors ban and destroy holy images; after more than a century of struggle the icons are restored in 843, a victory Orthodox Christians still celebrate every year.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • Imago Dei: The Byzantine Apologia for Icons — Jaroslav Pelikan, Princeton University Press (1990)
  • Byzantium in the Iconoclast Era, c. 680–850: A History — Leslie Brubaker and John Haldon, Cambridge University Press (2011)
  • Byzantium: The Surprising Life of a Medieval Empire — Judith Herrin, Allen Lane (2007)

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★ Why it matters today

On the first Sunday of Lent, the "Sunday of Orthodoxy", parishes around the world carry icons in procession to celebrate the restoration of 843. Icons in every church and home, kissed, lit with lamps and carried in processions, are the most visible mark of Orthodox life, and the theology defended in this struggle is why.

What happened

By the eighth century, painted images of Christ, Mary and the saints filled Byzantine churches and homes. After crushing defeats by the Arab armies, some Byzantines asked whether God was punishing the empire for idolatry.

How it's seen
Orthodox view

Because God truly became a man in Christ, he can be depicted. Honour given to an icon passes to the person it shows; worship belongs to God alone.

Historians

The old picture of fanatical iconoclast emperors is largely the victors' version.

Read the full story · 1 min
Debated by historians

The Byzantine commonwealth

843 – 1203
863–885 faithlanguageidentity

Cyril and Methodius and the Slavic mission

Two brothers from Thessalonica take Christianity to the Slavs in their own language, inventing an alphabet and laying the foundations of Slavic Orthodoxy.

  • The Byzantine Commonwealth: Eastern Europe, 500–1453 — Dimitri Obolensky, Weidenfeld & Nicolson (1971)
  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

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★ Why it matters today

Church Slavonic, the liturgical language the brothers created, is still sung in Russian, Serbian, Bulgarian and Ukrainian churches, and the Cyrillic alphabet named after Cyril is used by some 250 million people. Their principle, worship in the people's own tongue, shaped Orthodox missions from Alaska to Japan.

What happened

In 862 Prince Rastislav of Great Moravia, in today's Czech Republic and Slovakia, asked Constantinople for teachers who could explain the faith in Slavic. The emperor sent two brothers from Thessalonica who had grown up speaking the local Slavic dialect: Constantine, a brilliant scholar who took the monastic name Cyril shortly before his death, and Methodius.

Read the full story · 1 min
Well established
988 religionstatehoodidentity

The Christianisation of Kyivan Rus'

Prince Volodymyr the Great of Kyiv adopts Byzantine Christianity for his realm.

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★ Why it matters today

For Orthodox Russians, Ukrainians and Belarusians, 988 is the birth of their Christian world, and Volodymyr is venerated as "equal to the apostles". The same baptism is now fought over: Moscow's church sees Kyiv as the cradle of a single "Holy Rus'", while Ukraine's independent Orthodox church claims Volodymyr as its own founder.

What happened

By the late tenth century Kyiv was the capital of Kyivan Rus', a large and loosely held realm of East Slavic tribes, ruled by a dynasty of Scandinavian origin. Its prince, Volodymyr (Vladimir in Russian), had come to power in 980 by defeating his half-brother, and at first he backed the old gods.

How it's seen
How Ukrainians see it

The founding moment of a Kyiv-centred Christian civilisation that Ukraine continues directly, on a path that later diverged from Moscow's.

How the Russian state sees it

The shared cradle of a single people.

Orthodox tradition

The Primary Chronicle tells how Volodymyr's envoys, sent to compare religions, found the liturgy in Constantinople so beautiful that "we knew not whether we were in heaven or on earth".

Read the full story · 2 min Inside: What changed · Whose heritage?
Well established
1054 (mutual excommunications lifted 1965) faithpolitics

The Great Schism between East and West

Legates of the pope and the patriarch of Constantinople excommunicate each other, a symbolic moment in the slow split between Catholic West and Orthodox East.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • Saints and Sinners: A History of the Popes — Eamon Duffy, Yale University Press (2014)
  • A History of Christianity: The First Three Thousand Years — Diarmaid MacCulloch, Allen Lane (2009)

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★ Why it matters today

Orthodox Christians see themselves as the continuation of the undivided early church, from which Rome departed. Relations with Catholics are now warm at the top, with patriarchs and popes praying together, but many Orthodox, especially monks and ordinary believers in Greece, Serbia and Russia, remain wary of anything that looks like submission to Rome.

What happened

Greek East and Latin West had been drifting apart for centuries, divided by language, politics and theology. Rome claimed authority over the whole church as Peter's see; Constantinople saw the pope as first among equal patriarchs.

How it's seen
Catholic view

The bishop of Rome, as Peter's successor, has a God-given primacy over the whole church, and the West was right to add the "filioque" to the creed.

Orthodox view

Rome claimed a supremacy the early church never gave it and changed the shared creed on its own authority.

Read the full story · 1 min
Well established

Crusade, conquest & the fall of the City

1204 – 1453
April 1204 (Latin rule until 1261) warfaithconquest

The Fourth Crusade sacks Constantinople

Western crusaders bound for Egypt turn on Christian Constantinople, plunder the city and set up a Latin empire, turning the split between East and West into lasting bitterness.

  • The Fourth Crusade and the Sack of Constantinople — Jonathan Phillips, Jonathan Cape (2004)
  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Crusades: A History — Jonathan Riley-Smith, Yale University Press
  • Byzantium: The Surprising Life of a Medieval Empire — Judith Herrin, Allen Lane (2007)

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★ Why it matters today

For many Orthodox, 1204 rather than 1054 is when the schism became real: Christians from the West looted their holiest city and placed a Latin patriarch on the throne of Hagia Sophia. Pope John Paul II expressed sorrow for it in 2001 and 2004, but suspicion of Western Christianity, especially in Greece, still draws on this memory.

What happened

The Fourth Crusade set out to attack Egypt, but its leaders could not pay Venice for the fleet that carried them. To clear the debt they first sacked the Christian city of Zara on the Adriatic, then backed a Byzantine prince, Alexios, who promised money and troops if they put him on the throne in Constantinople.

How it's seen
Orthodox memory

Fellow Christians bearing the cross desecrated churches, stole relics and killed civilians.

Historians

The sack was not planned by the pope, who had forbidden attacks on Christians; the crusade was diverted by debts to Venice and by entanglement in a Byzantine succession dispute.

Read the full story · 1 min
Well established
1448–1589 faithempireidentity

Moscow, the "Third Rome"

After rejecting union with Rome and seeing Constantinople fall, the Russian church becomes self-governing and Moscow comes to see itself as the last guardian of true Orthodoxy.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • Moscow, the Third Rome: The Origins and Transformations of a "Pivotal Moment" — Marshall Poe, Jahrbücher für Geschichte Osteuropas (2001)
  • Russia: People and Empire, 1552–1917 — Geoffrey Hosking, Harvard University Press (1997)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

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★ Why it matters today

The Russian Orthodox Church is by far the largest Orthodox church, and the idea that Moscow has a special mission to defend Orthodoxy still echoes in Russian church and state rhetoric. Other Orthodox, especially Greeks and Ukrainians, see in it a bid for leadership that rivals Constantinople's, a tension behind many modern quarrels.

What happened

In 1439, at the Council of Florence, a Byzantine delegation desperate for Western help against the Ottomans accepted union with Rome. At home the union was widely rejected, and in Moscow Grand Prince Vasily II arrested the Greek metropolitan who had signed it.

How it's seen
Russian Orthodox tradition

When the Greeks compromised with Rome at Florence and Constantinople fell, Providence passed the care of the true faith to Orthodox Russia and its tsar, heir of the Christian emperors.

Historians

The "Third Rome" phrase came from a monk's letter and was mainly a warning to the ruler to be righteous.

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Debated by historians
29 May 1453 conquestempirefaith

The conquest of Constantinople

Sultan Mehmed II takes Constantinople after a seven-week siege, ending the Byzantine Empire and making the city, Istanbul, the Ottoman capital.

  • 1453: The Holy War for Constantinople and the Clash of Islam and the West — Roger Crowley, Hyperion (2005)
  • Osman's Dream: The Story of the Ottoman Empire, 1300-1923 — Caroline Finkel, John Murray (2005)
  • The Ottoman Empire: The Classical Age, 1300–1600 — Halil İnalcık, Weidenfeld & Nicolson (1973)
  • The Great Church in Captivity — Steven Runciman, Cambridge University Press (1968)

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★ Why it matters today

For Orthodox Christians, and Greeks above all, 1453 is "the Fall of the City", the end of the Christian Roman Empire that had shaped their faith. It began centuries of Orthodox life under Muslim rule, and the Ecumenical Patriarch still lives in Istanbul. Hagia Sophia's reconversion to a mosque in 2020 was mourned in Orthodox churches worldwide.

What happened

By the 1450s the Byzantine Empire, once ruler of the eastern Mediterranean, was little more than the city of Constantinople, its population shrunk to perhaps fifty thousand inside its ancient walls, surrounded by Ottoman territory on both sides of the Bosphorus.

How it's seen
Turkish view

The Conquest fulfilled a hadith praising the commander who would take Constantinople, opened a new age in world history and made the city Turkish and Muslim.

Greek and Orthodox view

The Fall of the City ended the thousand-year Christian Roman Empire, and three days of sack, killing and enslavement followed.

Historians

By 1453 Byzantium was a shrunken city-state surrounded by Ottoman lands.

Read the full story · 2 min Inside: The siege · The sack and the new city · Two memories
Well established

Under the sultans & the tsars

1454 – 1820
1454–1923 faithempireidentity

Under the Ottomans: the Rum millet

Under Ottoman rule the Patriarch of Constantinople becomes the civil as well as religious head of the empire's Orthodox Christians, who survive for centuries as a protected but subordinate community.

  • The Great Church in Captivity — Steven Runciman, Cambridge University Press (1968)
  • A Concise History of Greece — Richard Clogg, Cambridge University Press (1992)
  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Ottoman Empire: The Classical Age, 1300–1600 — Halil İnalcık, Weidenfeld & Nicolson (1973)

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★ Why it matters today

The Ecumenical Patriarchate still sits in Istanbul's Fener district, with a tiny Greek flock and limits on training its clergy, while honoured as "first among equals" by Orthodox worldwide. For Greeks, Serbs, Bulgarians and Romanians, the church's role in keeping language and identity alive under the Ottomans is why faith and nation are so entwined.

What happened

After the conquest of 1453, Mehmed II installed the scholar-monk Gennadios Scholarios as patriarch in 1454 and gave him authority over the Orthodox of the empire, the Rum ("Roman") community. The patriarch became a kind of ethnarch: head of the church, but also judge in family law, collector of taxes and answerable to the sultan for his people's loyalty.

How it's seen
Orthodox memory

Four centuries of "Turkish yoke", when the church kept the nation alive: the secret schools, the neomartyrs executed for their faith, children taken in the devshirme levy, and Patriarch Gregory V hanged at the patriarchate's gate on Easter Sunday 1821.

Ottoman and Turkish view

The Ottomans protected Orthodox Christians, guaranteed their worship and gave their patriarch wide authority, a tolerance unusual in its day compared with the religious wars of Christian Europe.

Historians

Christians were a protected but unequal community, paying extra taxes and facing legal limits, and the "millet system" was less formal and uniform than later accounts suggest.

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Debated by historians

Nations & their churches

1821 – 1916
1833–1885 faithidentitypolitics

Nations and their churches

As Greece, Serbia, Romania and Bulgaria win independence from the Ottomans, each sets up its own self-governing ("autocephalous") national church.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • A Concise History of Greece — Richard Clogg, Cambridge University Press (1992)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

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★ Why it matters today

Orthodoxy today is a family of self-governing national churches, which is why people say "Greek Orthodox" or "Serbian Orthodox". It explains how closely many Orthodox tie faith to nationality, and why disputes over who may grant autocephaly, as in Ukraine, become so bitter.

What happened

Independent Greece declared its church autocephalous in 1833, and Constantinople recognised it in 1850. Serbia's church followed in 1879 and Romania's in 1885. Bulgaria won its own exarchate from the sultan in 1870, but the patriarchate condemned it in 1872 for "phyletism", organising the church by ethnicity, and the breach was healed only in 1945.

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Well established

Persecution & exile

1917 – 1987
1917–1988 persecutionfaithpolitics

Soviet persecution of the church

The Bolsheviks set out to destroy religion; by the late 1930s tens of thousands of priests, monks and nuns had been killed or sent to the camps and almost every church in the Soviet Union was closed.

  • The Russian Church under the Soviet Regime, 1917–1982 — Dimitry Pospielovsky, St Vladimir's Seminary Press (1984)
  • A Long Walk to Church: A Contemporary History of Russian Orthodoxy — Nathaniel Davis, Westview Press (1995)
  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • A People's Tragedy: The Russian Revolution, 1891–1924 — Orlando Figes, Jonathan Cape (1996)
  • Gulag: A History — Anne Applebaum, Doubleday (2003)

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★ Why it matters today

The Russian church canonised more than a thousand "New Martyrs and Confessors" in 2000, and families across Russia, Ukraine, Belarus and Georgia remember grandparents who were baptised in secret. The same era left hard questions: about clergy who cooperated with the KGB, and about a church that, after surviving the state's hostility, has grown very close to the state's power.

What happened

On the eve of the revolution the Russian Orthodox Church was one of the largest institutions in the empire, with more than 50,000 churches and an established place beside the tsar. In 1917 a church council restored the patriarchate, abolished by Peter the Great, and elected Patriarch Tikhon, just as the Bolsheviks took power.

How it's seen
The church of the martyrs

The twentieth century produced more Orthodox martyrs than any before it. Faith survived because grandmothers kept icons in the corner, baptised children secretly and taught them prayers.

A compromised survival

To survive, the official church after 1927 and especially after 1943 pledged loyalty to the Soviet state, and some bishops worked with the security services.

Read the full story · 2 min Inside: War on religion · A wartime revival and new pressure · Memory
Well established

Revival & new divisions

1988 – today
1988–2000s faithidentitypolitics

Revival after communism

From the millennium of Rus' in 1988 and the fall of communism, Orthodox churches across Eastern Europe reopen, rebuild and see millions return to an Orthodox identity.

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★ Why it matters today

Across Russia, Ukraine, Romania, Bulgaria, Serbia and Georgia, large majorities now call themselves Orthodox, though in Russia only a small share attend church weekly. For many, Orthodoxy is above all a mark of national belonging; for others it is a hard-won personal faith. Close ties between churches and governments, especially in Russia, divide believers.

What happened

In 1988 Gorbachev allowed the Russian church to celebrate the thousandth anniversary of the baptism of Rus' in public, and a 1990 law guaranteed freedom of conscience. After 1991 churches and monasteries reopened in their thousands, often restored by volunteers from ruins. Moscow's Cathedral of Christ the Saviour, blown up in 1931, was rebuilt and consecrated in 2000.

Read the full story · 1 min
Well established
December 2018 – January 2019 faithpoliticsidentity

Autocephaly for the Orthodox Church of Ukraine

The Ecumenical Patriarch grants independence to a newly united Orthodox Church of Ukraine, and the Russian Orthodox Church breaks communion with Constantinople in protest.

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★ Why it matters today

The dispute split the Orthodox world. Moscow does not recognise the new church and cut ties with Constantinople and the churches that recognised it, while Russia's full-scale invasion of Ukraine in 2022 drove millions of Ukrainians away from the Moscow-linked church. Few subjects are more sensitive among Orthodox Christians today.

What happened

Since independence in 1991, Ukraine had several rival Orthodox churches: the largest, the Ukrainian Orthodox Church, belonged to the Moscow Patriarchate, while the Kyiv Patriarchate and the Ukrainian Autocephalous Orthodox Church were recognised by no other Orthodox church. After Russia seized Crimea and backed the war in Donbas in 2014, pressure grew for a single independent church.

How it's seen
Ukrainian view

An independent nation deserves an independent church, as Greece, Serbia and Romania received.

Moscow Patriarchate view

Kyiv has belonged to the Moscow Patriarchate's canonical territory for over three centuries, and Constantinople had no right to intervene or to legitimise clergy Moscow regarded as schismatic.

Ecumenical Patriarchate view

As "first among equals", Constantinople has the right to hear appeals and grant autocephaly, as it did for the Balkan churches.

Read the full story · 1 min
Debated by historians

Core values & worldview

If you ask an Orthodox friend what their faith is about, you may not get a list of doctrines. You are more likely to hear about the smell of incense, the midnight cry of “Christ is risen!”, a grandmother’s icon corner, or the long fasts before Easter. Orthodoxy is a faith you learn by doing and seeing as much as by reading.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Orthodox Way — Kallistos Ware, St Vladimir's Seminary Press (1979)

God as Trinity. Orthodox Christians believe in one God, Father, Son and Holy Spirit, as set out in the creed of Nicaea and Constantinople, which they sing at every Liturgy, without the word filioque (“and the Son”) that the Western churches added. Jesus Christ is fully God and fully human, and his resurrection is the centre of everything: Pascha (Easter) is “the feast of feasts”.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • Byzantine Theology: Historical Trends and Doctrinal Themes — John Meyendorff, Fordham University Press (1974)

Salvation as healing. Orthodox tend to speak of sin less as a crime to be punished than as a sickness to be healed, and of salvation as theosis, being drawn into God’s own life. That is why the church calls itself a “hospital” and why prayer, fasting, confession and communion are seen as medicine rather than duty.

  • The Orthodox Way — Kallistos Ware, St Vladimir's Seminary Press (1979)
  • Byzantine Theology: Historical Trends and Doctrinal Themes — John Meyendorff, Fordham University Press (1974)

Tradition and the councils. Orthodox read the Bible within holy tradition: the creeds, the seven ecumenical councils from 325 to 787, the writings of the Church Fathers, the liturgy and the icons. There is no single head with authority to define doctrine; the church makes decisions in councils of bishops, and its truth is guarded, Orthodox say, by the whole people of God.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)
See The Great Schism.

Mystery and humility. Orthodox theology loves to say what God is not (“apophatic” theology), and is comfortable with mystery. The sacraments are called “mysteries”. Many Orthodox are wary of over-explaining the faith, and of Western habits of defining everything.

  • The Orthodox Way — Kallistos Ware, St Vladimir's Seminary Press (1979)
  • Byzantine Theology: Historical Trends and Doctrinal Themes — John Meyendorff, Fordham University Press (1974)

Mary and the saints. The Virgin Mary is honoured as Theotokos, “God-bearer”, and the saints are a living family, present in their icons and relics. Orthodox ask the saints for their prayers, celebrate their feasts, and often feel especially close to a patron saint.

  • The Orthodox Church — Timothy Ware, Penguin (1993)

Daily life & customs

Going to church. The main Sunday service is the Divine Liturgy, usually that of St John Chrysostom, often preceded by a Saturday-evening Vigil. Traditionally congregants stand, though many churches outside Eastern Europe now have pews. On arriving, people buy and light thin beeswax candles and kiss the icons. In Slavic churches women often cover their heads. The iconostasis, a screen of icons, separates the altar from the nave, and the singing goes on almost without pause.

  • For the Life of the World: Sacraments and Orthodoxy — Alexander Schmemann, St Vladimir's Seminary Press (1973)
  • The Orthodox Church — Timothy Ware, Penguin (1993)
Practice varies enormously: Pew found that about 6% of Orthodox in Russia attend church weekly, compared with 78% in Ethiopia.

Icons at home. Many homes have an “icon corner”, traditionally facing east, with a lamp, a few icons and perhaps holy water or blessed palms. Families pray there, and many cross themselves (right to left, with three fingers joined) when passing a church.

Fasting. Orthodox fasting is strict and frequent: traditionally no meat, dairy, eggs, and often fish, wine and olive oil, on most Wednesdays and Fridays and during four seasons, Great Lent before Pascha, the Nativity fast before Christmas, the Apostles’ fast and the Dormition fast in August. For the most observant this adds up to something like half the year; in practice many people keep part of it, and the sick, children and travellers are let off. Bakeries and restaurants in Greece, Cyprus and Ethiopia offer special “fasting” menus.

  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)
  • The Orthodox Church of Ethiopia: A History — John Binns, I.B. Tauris (2016)

Pascha. The great feast begins near midnight on Holy Saturday. The church is dark; the priest brings out a single flame, which spreads candle to candle, and the people process outside and then hear the cry “Christ is risen!”, answering “Truly he is risen!” At the end, St John Chrysostom’s Easter sermon is read. Families then break the fast with red eggs, Easter breads and lamb. For forty days afterwards Orthodox greet each other with the Paschal greeting.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • For the Life of the World: Sacraments and Orthodoxy — Alexander Schmemann, St Vladimir's Seminary Press (1973)

The calendar. Pascha is calculated by the old Julian calendar, so it usually falls after Western Easter, though sometimes on the same day. The Russian, Serbian, Georgian and Jerusalem churches keep the Julian calendar for fixed feasts too, which is why their Christmas falls on 7 January; the Greek, Romanian, Bulgarian churches and Constantinople use a revised calendar and celebrate it on 25 December.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

Life events. Babies are baptised by full immersion, three times, and immediately chrismated (confirmed) and given communion, so even infants receive. Weddings feature crowns held over the couple’s heads and a dance around the table. Priests may marry before ordination, so a parish priest often has a wife and children, though bishops are chosen from monks. Divorce and remarriage are permitted in limited circumstances, with a more penitential service. At funerals the coffin is often open, and memorial services with boiled wheat (koliva) follow at forty days and on anniversaries. Many people celebrate their saint’s name day more than their birthday.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

Wounds & sensitivities

The Fourth Crusade and the West. For many Orthodox, especially Greeks, the sack of Constantinople in 1204 is the moment when Western Christians showed what they thought of the East. Combined with centuries of Catholic missionary pressure in Eastern Europe, it left a lasting wariness of Rome and of the West.

  • The Fourth Crusade and the Sack of Constantinople — Jonathan Phillips, Jonathan Cape (2004)
  • The Orthodox Church — Timothy Ware, Penguin (1993)

The Fall of the City. 1453 is mourned, and the conversion of Hagia Sophia back into a mosque in 2020 reopened the wound. The Ecumenical Patriarchate in Istanbul serves a Greek community that has shrunk to a few thousand, and its theological school on the island of Halki has been closed since 1971.

  • 1453: The Holy War for Constantinople and the Clash of Islam and the West — Roger Crowley, Hyperion (2005)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

Persecution and genocide. Orthodox families across the former Soviet bloc remember priests shot, churches blown up and faith passed on in secret. Armenians, Assyrians and Greeks remember the massacres and expulsions of the last Ottoman years, above all the Armenian Genocide. Copts in Egypt and Christians in Syria and Iraq have faced deadly attacks within living memory.

  • The Russian Church under the Soviet Regime, 1917–1982 — Dimitry Pospielovsky, St Vladimir's Seminary Press (1984)
  • An Introduction to the Christian Orthodox Churches — John Binns, Cambridge University Press (2002)
See Soviet persecution.

Being treated as “Russian”. Many Orthodox, Greeks, Georgians, Romanians, Ukrainians, Arabs and Ethiopians among them, are tired of their faith being equated with Russia or the Kremlin, and Orthodox who oppose the war against Ukraine resent being lumped in with the Moscow Patriarchate’s support for it.

The Ukrainian church dispute. The independence of the Orthodox Church of Ukraine and the war have set Orthodox against Orthodox, with families and parishes split. Approach it gently, and don’t assume which side someone is on.

Modern attitudes

Faith as belonging. In much of Eastern Europe, being Orthodox is tied to being Greek, Serbian, Romanian or Russian. Pew found large majorities in these countries said being Orthodox was important to being “truly” part of the nation, even among people who rarely attend church or doubt doctrines.

Conservative on social issues. Orthodox churches are generally conservative on sexuality, gender and family, and surveys in Orthodox-majority countries show strong opposition to same-sex marriage. In the diaspora, especially in North America and Western Europe, views are more varied, and converts often bring a more intense, deliberate piety.

Church and state. Orthodoxy inherited from Byzantium the ideal of symphonia, a harmony between church and state. Critics say this has made churches too close to governments, from the Russian church’s support for the Kremlin and the war against Ukraine to nationalist clergy in the Balkans; many Orthodox theologians in the diaspora and in Ukraine have publicly opposed that.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • The Russo-Ukrainian War: The Return of History — Serhii Plokhy, W. W. Norton (2023)
  • A Long Walk to Church: A Contemporary History of Russian Orthodoxy — Nathaniel Davis, Westview Press (1995)

A shrinking share, a deepening faith. The Orthodox share of the world’s Christians has fallen from about 20% a century ago to about 12%, because populations in Orthodox countries are ageing while Christianity grows in Africa and elsewhere. Yet in Ethiopia, Romania and Georgia, religion remains vital, and Orthodoxy attracts a small but steady stream of converts in the West.

See Revival after communism.

Ecology. Under Patriarch Bartholomew, the “Green Patriarch”, Orthodoxy has developed a strong teaching on care for creation, and 1 September, the start of the church year, is a day of prayer for the environment.

  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

Not all Orthodox Christians are the same

Eastern and Oriental Orthodox. The biggest distinction is between the Eastern Orthodox (Greek, Russian, Serbian, Romanian, Bulgarian, Georgian, Antiochian and others), who accept seven ecumenical councils, and the Oriental Orthodox (Coptic, Ethiopian, Eritrean, Armenian, Syriac and Malankara Indian), who accept only the first three and parted ways after Chalcedon in 451. They are not in communion, and their liturgies, languages and calendars differ, but they share icons, fasting, monasticism and a deep sense of antiquity. Pew counts the Oriental churches as roughly a fifth of all Orthodox.

Greek and Slavic, Arab and African. A Greek parish feels very different from a Russian one: Byzantine chant against Russian choral harmony, Greek against Church Slavonic. Arabic-speaking Orthodox in Syria, Lebanon and Palestine trace their faith to Antioch and Jerusalem and resent being called converts. Ethiopian Orthodoxy, with its own scriptures, the Ge’ez language, Saturday Sabbath customs and long fasts, is a world of its own.

  • An Introduction to the Christian Orthodox Churches — John Binns, Cambridge University Press (2002)
  • The Orthodox Church of Ethiopia: A History — John Binns, I.B. Tauris (2016)
  • The Orthodox Church — Timothy Ware, Penguin (1993)

Cradle Orthodox and converts. In America, Britain and Australia, most Orthodox are descendants of immigrants, but converts, many of them former Protestants, now make up a significant share of some parishes and are often among the most devout.

  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

Practising and cultural. Many people in Russia, Greece or Serbia call themselves Orthodox, keep Easter and baptise their children, but rarely go to church or keep the fasts. Others, especially those touched by monastic life on Athos or in Russian monasteries, live a demanding rhythm of prayer and fasting.

Ukraine and Russia. In Ukraine, Orthodox are divided between the independent Orthodox Church of Ukraine and the Ukrainian Orthodox Church historically tied to Moscow, and many simply say they are “just Orthodox”. Some Russian Orthodox, inside and outside Russia, have opposed the war at personal cost.

Meeting someone

Conversation starters

  • Pascha. Ask how their family celebrates: the midnight service, cracking red eggs, the first meal after Lent. If you know them well, greeting them with “Christ is risen!” at Easter will usually delight them.
  • Their name day. Many Orthodox celebrate the feast of their namesake saint, and may be pleased you asked.
  • Food and fasting. Lenten recipes, Christmas Eve dishes and the joys of breaking the fast are warm topics, and Orthodox fasting cuisine is genuinely interesting.
  • Pilgrimages and monasteries. Many have visited Athos, Jerusalem, Lalibela, Kyiv’s Cave Monastery or a local monastery, and have stories.

Topics to approach carefully

  • Russia, Ukraine and the church split. Don’t assume an Orthodox person supports or opposes either church or government; the war has divided families and parishes.
    • The Orthodox Church in Ukraine: A Century of Separation — Nicholas E. Denysenko, Northern Illinois University Press (2018)
    • The Russo-Ukrainian War: The Return of History — Serhii Plokhy, W. W. Norton (2023)
  • 1204, 1453 and Hagia Sophia. These are real wounds for Greeks and many others. Joking about “the Fall” or about Istanbul versus Constantinople can sting.
  • Genocides and persecution. For Armenians, Assyrians, Greeks from Anatolia and Copts, these are family history.
  • Communion. Orthodox communion is normally only for Orthodox Christians who have prepared by fasting and confession. As a guest, you can come forward at the end of the Liturgy for the blessed bread (antidoron) that is offered to all.
    • The Orthodox Church — Timothy Ware, Penguin (1993)

Common misconceptions

  • “Orthodox means Russian.” Russians are the largest group, but Orthodox include Greeks, Romanians, Serbs, Georgians, Ukrainians, Arabs, Ethiopians, Copts, Armenians, Indians and many converts worldwide.
  • “Orthodoxy is Catholicism without the pope.” The two share much, but Orthodox differ in theology (the filioque, purgatory, original sin), in the role of councils, in married clergy and in a whole spiritual style; they see Rome as having left them, not the reverse.
    • The Orthodox Church — Timothy Ware, Penguin (1993)
  • “They worship icons.” Orthodox venerate icons, honouring the person shown, while worship is given to God alone, a distinction defined in 787.
    • Imago Dei: The Byzantine Apologia for Icons — Jaroslav Pelikan, Princeton University Press (1990)
    • The Orthodox Church — Timothy Ware, Penguin (1993)
  • “Orthodox Christmas is a different Christmas.” It is the same 25 December, counted on the Julian calendar, which currently runs 13 days behind.
    • The Orthodox Church — Timothy Ware, Penguin (1993)
  • “Orthodox Christians are connected to Orthodox Judaism.” The word just means “right belief”; the two are unrelated.
  • “All Orthodox churches are one church with one head.” Orthodoxy is a family of self-governing churches; the Ecumenical Patriarch has a primacy of honour, not command, and the Oriental Orthodox are a separate family.
    • The Orthodox Church — Timothy Ware, Penguin (1993)
    • An Introduction to the Christian Orthodox Churches — John Binns, Cambridge University Press (2002)

People everyone knows

Saint John Chrysostom

Saint John Chrysostom

c. 347–407

A preacher from Antioch so eloquent he was nicknamed "Golden Mouth" (Chrysostomos), who became archbishop of Constantinople in 398. He denounced the luxury of the rich and the court, was exiled by the empress Eudoxia and died on the road to exile. The Divine Liturgy that Orthodox churches celebrate on most Sundays bears his name, and his Easter sermon is read aloud at every Paschal night service.

  • Golden Mouth: The Story of John Chrysostom, Ascetic, Preacher, Bishop — J. N. D. Kelly, Duckworth (1995)
  • The Orthodox Church — Timothy Ware, Penguin (1993)

Saints Cyril and Methodius

Saints Cyril and Methodius

c. 826–869 and c. 815–885

Brothers from Thessalonica who in 863 took Christianity to the Slavs of Great Moravia in their own language, creating an alphabet and translating the Gospels and liturgy. Their disciples carried this Slavonic Christianity to Bulgaria, Serbia and Rus'. Honoured as "equal to the apostles", they stand for the Orthodox conviction that people should worship God in a language they understand.

  • The Byzantine Commonwealth: Eastern Europe, 500–1453 — Dimitri Obolensky, Weidenfeld & Nicolson (1971)
  • The Orthodox Church — Timothy Ware, Penguin (1993)

Volodymyr the Great

Volodymyr the Great

c. 956–1015

Grand prince of Kyiv who expanded Rus' and in 988 made Byzantine Christianity its faith. Venerated as a saint "equal to the Apostles", he is claimed as a founder by Ukraine, Russia and Belarus alike.

Saint Sergius of Radonezh

Saint Sergius of Radonezh

c. 1314–1392

A hermit in the forests north of Moscow whose community became the Trinity-Sergius Lavra, the heart of Russian monasticism. Gentle and humble, he refused to become metropolitan, yet tradition says he blessed Prince Dmitry before the victory over the Golden Horde at Kulikovo in 1380. Russians and many other Orthodox revere him as the model of holiness, and Andrei Rublev's Trinity icon was painted in his honour.

  • The Orthodox Church — Timothy Ware, Penguin (1993)
  • Russia: People and Empire, 1552–1917 — Geoffrey Hosking, Harvard University Press (1997)

Saint Maria Skobtsova (Mother Maria)

Saint Maria Skobtsova (Mother Maria)

1891–1945

A Russian poet and revolutionary-era politician who emigrated to Paris, became a nun and turned her rented house into a shelter for the poor, the homeless and the addicted. Under Nazi occupation she helped Jews escape and was sent to Ravensbrück, where she died in 1945. Canonised by the Ecumenical Patriarchate in 2004 and recognised by Yad Vashem as Righteous Among the Nations, she shows Orthodoxy's call to see Christ in every person.

  • Pearl of Great Price: The Life of Mother Maria Skobtsova, 1891–1945 — Sergei Hackel, St Vladimir's Seminary Press (1982)
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell (2008)

Ecumenical Patriarch Bartholomew

Ecumenical Patriarch Bartholomew

born 1940

Born on the Turkish island of Imbros (Gökçeada), he has been Archbishop of Constantinople and Ecumenical Patriarch since 1991, "first among equals" among Orthodox bishops. Nicknamed the "Green Patriarch" for his teaching that harming creation is a sin, he worked for reconciliation with Rome and convened the Holy and Great Council of 2016 in Crete. His grant of independence to the Orthodox Church of Ukraine in 2019 led Moscow to break communion with him.

Try it yourself

The quickest way into a culture: a song, a film, a book and a dish.

“For He was made man that we might be made God.”
— Athanasius of Alexandria, On the Incarnation 54 (4th century); trans. Archibald Robertson
  • On the Incarnation of the Word (Nicene and Post-Nicene Fathers, Second Series, vol. 4) — Athanasius of Alexandria; trans. Archibald Robertson, Christian Literature Publishing Co. (1892)
“We knew not whether we were in heaven or on earth. For on earth there is no such splendor or such beauty, and we are at a loss how to describe it. We only know that God dwells there among men.”
— Envoys of Prince Volodymyr on the liturgy in Constantinople, Russian Primary Chronicle; trans. Cross and Sherbowitz-Wetzor
  • The Russian Primary Chronicle: Laurentian Text — Samuel Hazzard Cross and Olgerd P. Sherbowitz-Wetzor (trans.), Mediaeval Academy of America (1953)

Listen

  • Rachmaninoff's All-Night Vigil (1915) A choral setting of the Orthodox evening and morning services, built on old Russian chants; Orthodox church singing is unaccompanied, by voices alone.
    ▶ Listen

Watch

  • Andrei Rublev (1966) Andrei Tarkovsky's epic of the medieval icon-painter amid war and cruelty, long restricted in the Soviet Union.
    ▶ Watch
  • The Island (2006) Pavel Lungin's film about a tormented holy fool-monk on a northern Russian island, a surprise hit with Orthodox audiences.
    ▶ Watch

Read

  • The Brothers Karamazov Dostoevsky's 1880 novel, whose gentle Elder Zosima and his monastery give one of literature's great portraits of Orthodox holiness.
    Find it
  • The Way of a Pilgrim An anonymous 19th-century Russian tale of a wanderer learning to "pray without ceasing" with the Jesus Prayer, read by many people discovering Orthodoxy.
    Find it

Taste

  • Red eggs and Easter breads At Pascha, families crack red-dyed eggs against each other and break the Lenten fast with Greek tsoureki, Russian kulich and paskha, or Ukrainian and Romanian paska, often blessed in church first.
    Recipe

See & do

  • Andrei Rublev's Trinity The early-15th-century icon of three angels at Abraham's table, painted for the monastery of St Sergius, often called the greatest of all Russian icons.
    Look it up
  • Timkat Ethiopia's Epiphany festival, when priests carry replicas of the Ark of the Covenant (tabots) in procession and crowds in white gather to renew their baptism.
    Look it up
  • The Jesus Prayer "Lord Jesus Christ, Son of God, have mercy on me", repeated quietly, often on a knotted prayer rope, at the heart of Orthodox monastic and everyday prayer.
    Look it up

Where

Homeland Diaspora Significant place

Related

Protestantism · Catholicism · Russia · Ukraine · Armenians · Ethiopia · Egypt · Turkey (Türkiye) · Islam

Sources & further reading

  • For the Life of the World: Sacraments and Orthodoxy — Alexander Schmemann, St Vladimir's Seminary Press, 1973
  • The Ukrainian Question: The Russian Empire and Nationalism in the Nineteenth Century — Alexei Miller, Central European University Press, 2003
  • Kleine Geschichte der Ukraine (5th revised ed.) — Andreas Kappeler, C.H. Beck, 2019
  • Gulag: A History — Anne Applebaum, Doubleday, 2003
  • On the Incarnation of the Word (Nicene and Post-Nicene Fathers, Second Series, vol. 4) — Athanasius of Alexandria; trans. Archibald Robertson, Christian Literature Publishing Co., 1892
  • Osman's Dream: The Story of the Ottoman Empire, 1300-1923 — Caroline Finkel, John Murray, 2005
  • A History of Christianity: The First Three Thousand Years — Diarmaid MacCulloch, Allen Lane, 2009
  • The Byzantine Commonwealth: Eastern Europe, 500–1453 — Dimitri Obolensky, Weidenfeld & Nicolson, 1971
  • The Russian Church under the Soviet Regime, 1917–1982 — Dimitry Pospielovsky, St Vladimir's Seminary Press, 1984
  • Saints and Sinners: A History of the Popes — Eamon Duffy, Yale University Press, 2014
  • Turkey: A Modern History (4th edition) — Erik J. Zürcher, I.B. Tauris, 2017
  • Russia: People and Empire, 1552–1917 — Geoffrey Hosking, Harvard University Press, 1997
  • The Ottoman Empire: The Classical Age, 1300–1600 — Halil İnalcık, Weidenfeld & Nicolson, 1973
  • The Early Church — Henry Chadwick, Penguin, 1993
  • Catechism of the Catholic Church (2nd edition) — Holy See, Libreria Editrice Vaticana, 1997
  • Leo XIV (official pages of the Holy See) — Holy See, Holy See
  • Volodymyr the Great (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies, 2024
  • Kyivan Rus' (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies, 2024
  • Hrushevsky, Mykhailo (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies, 2024
  • History of Ukraine (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies, 2024
  • Christianization of Ukraine (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies, 2024
  • Christmas (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies, 2024
  • The Orthodox Church in the Byzantine Empire — J. M. Hussey, Oxford University Press, 1986
  • Golden Mouth: The Story of John Chrysostom, Ascetic, Preacher, Bishop — J. N. D. Kelly, Duckworth, 1995
  • A Tomos for Ukraine's Orthodox Church: the Final Schism? — James Sherr, International Centre for Defence and Security (ICDS), 2019
  • Imago Dei: The Byzantine Apologia for Icons — Jaroslav Pelikan, Princeton University Press, 1990
  • The Orthodox Church: An Introduction to its History, Doctrine, and Spiritual Culture — John Anthony McGuckin, Wiley-Blackwell, 2008
  • An Introduction to the Christian Orthodox Churches — John Binns, Cambridge University Press, 2002
  • The Orthodox Church of Ethiopia: A History — John Binns, I.B. Tauris, 2016
  • Byzantine Theology: Historical Trends and Doctrinal Themes — John Meyendorff, Fordham University Press, 1974
  • The Fourth Crusade and the Sack of Constantinople — Jonathan Phillips, Jonathan Cape, 2004
  • The Crusades: A History — Jonathan Riley-Smith, Yale University Press
  • Byzantium: The Surprising Life of a Medieval Empire — Judith Herrin, Allen Lane, 2007
  • The Orthodox Way — Kallistos Ware, St Vladimir's Seminary Press, 1979
  • Religious self-identification of the population of Ukraine: dynamics and importance of question formulation (survey of 19 September – 5 October 2025) — Kyiv International Institute of Sociology, Kyiv International Institute of Sociology (KIIS), 2025
  • Byzantium in the Iconoclast Era, c. 680–850: A History — Leslie Brubaker and John Haldon, Cambridge University Press, 2011
  • Moscow, the Third Rome: The Origins and Transformations of a "Pivotal Moment" — Marshall Poe, Jahrbücher für Geschichte Osteuropas, 2001
  • A Long Walk to Church: A Contemporary History of Russian Orthodoxy — Nathaniel Davis, Westview Press, 1995
  • The Orthodox Church in Ukraine: A Century of Separation — Nicholas E. Denysenko, Northern Illinois University Press, 2018
  • Ukraine: A History (4th ed.) — Orest Subtelny, University of Toronto Press, 2009
  • A People's Tragedy: The Russian Revolution, 1891–1924 — Orlando Figes, Jonathan Cape, 1996
  • A History of Ukraine: The Land and Its Peoples (2nd ed.) — Paul Robert Magocsi, University of Toronto Press, 2010
  • Orthodox Christianity in the 21st Century — Pew Research Center, Pew Research Center, 2017
  • Religious Belief and National Belonging in Central and Eastern Europe — Pew Research Center, Pew Research Center, 2017
  • Russians Return to Religion, But Not to Church — Pew Research Center, Pew Research Center, 2014
  • Religiosity, confessional affiliation and inter-church relations in Ukrainian society (November 2025) — Razumkov Centre Sociological Service, Razumkov Centre, 2025
  • A Concise History of Greece — Richard Clogg, Cambridge University Press, 1992
  • 1453: The Holy War for Constantinople and the Clash of Islam and the West — Roger Crowley, Hyperion, 2005
  • The Russian Primary Chronicle: Laurentian Text — Samuel Hazzard Cross and Olgerd P. Sherbowitz-Wetzor (trans.), Mediaeval Academy of America, 1953
  • Pearl of Great Price: The Life of Mother Maria Skobtsova, 1891–1945 — Sergei Hackel, St Vladimir's Seminary Press, 1982
  • The Russo-Ukrainian War: The Return of History — Serhii Plokhy, W. W. Norton, 2023
  • The Gates of Europe: A History of Ukraine — Serhii Plokhy, Basic Books, 2015
  • The New Sultan: Erdogan and the Crisis of Modern Turkey — Soner Cagaptay, I.B. Tauris, 2017
  • The Great Church in Captivity — Steven Runciman, Cambridge University Press, 1968
  • Historic unification of Ukrainian Orthodox Church — Tadeusz A. Olszański, OSW Commentary, Centre for Eastern Studies, 2018
  • The Orthodox Church — Timothy Ware, Penguin, 1993
  • On the Historical Unity of Russians and Ukrainians — Vladimir Putin, Kremlin.ru, 2021