Biography

Cyril and Methodius were two Byzantine brothers of the 9th century, Christian missionaries among the Slavic peoples. They created the Glagolitic alphabet to translate liturgical texts into the Slavic language, laying the foundations of Slavic written culture.

Cyril and Methodius

Cyril and Methodius

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SpiritualityLiteratureCultureMiddle AgesThe Byzantine Empire and Central Europe in the 9th century, a period marked by the Christianization of the Slavic peoples and rivalry between Rome and Constantinople.
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Frequently asked questions

Cyril and Methodius were two Byzantine brothers of the 9th century sent to Christianize the Slavic peoples. What makes them decisive is that they created from scratch an alphabet – the Glagolitic – to translate the Bible and the liturgy into Old Church Slavonic, a language that had never been written down. The key point to remember is that this act laid the foundation for all written Slavic culture: without them, languages such as Russian, Bulgarian, or Serbian would not have the same literary tradition. Their work also broke the monopoly of Latin and Greek in the Church, which was revolutionary at the time.

Key Facts

  • Born in Thessalonica (Salonica), Constantine (the future Cyril) around 826-827 and Michael (the future Methodius) around 815
  • In 863, sent by the Byzantine emperor Michael III to Great Moravia at the request of Prince Rastislav
  • Around 863, Cyril created the Glagolitic alphabet to transcribe the Slavic language and translate the Scriptures
  • Cyril died in Rome in 869, and Methodius died in Moravia in 885
  • Proclaimed co-patrons of Europe by Pope John Paul II in 1980

Works & Achievements

Glagolitic alphabet (c. 863)

Creation of the first writing system adapted to the Slavic language, the foundation of all Slavic written culture.

Translation of the Gospels into Slavic (863-867)

The first written record of sacred texts in the language of the Slavic people, making the faith accessible.

Translation of the liturgical texts (c. 864)

Adaptation of prayers and church services into Slavic, allowing Mass to be celebrated in the local language.

Proglas (Preface to the Gospels) (c. 863-867)

A poem attributed to Cyril celebrating the value of writing in one's mother tongue, the first Slavic literary monument.

Organization of the Moravian Church (870-885)

The work of Methodius, who became archbishop and structured the young Slavic Church despite the opposition of the Frankish bishops.

Translation of legal and biblical texts (c. 880-885)

Methodius continued translating the Old Testament and collections of laws, enriching the Slavic heritage.

Anecdotes

Cyril's real name was actually Constantine: he only took the name Cyril at the very end of his life, when he became a monk in Rome a few weeks before his death in 869. It is under this monastic name that history has remembered him.

Before leaving on his mission to the Slavs, Constantine was nicknamed “the Philosopher” because he taught at the imperial school of Constantinople, one of the most prestigious of his time.

To translate the Bible and the liturgy into the Slavic language, Cyril invented an entirely new alphabet from scratch, the Glagolitic script, whose letters resembled no existing writing system. It was a colossal challenge because Slavic had sounds unknown to Greek.

Pope Adrian II officially supported the two brothers and authorized the liturgy in Slavic, which was revolutionary: at the time, only Latin, Greek, and Hebrew were considered worthy of celebrating God in the West.

After Cyril's death, Methodius carried on the work alone and was appointed Archbishop of Moravia. He spent nearly three years in prison, locked up by Frankish bishops hostile to the Slavic liturgy.

Primary Sources

Life of Constantine (Vita Constantini), Old Church Slavonic (late 9th century)
“Constantine set himself to prayer with his collaborators, and soon God revealed the letters to him, and he began to write down the words of the Gospel.”
Life of Methodius (Vita Methodii), Old Church Slavonic (late 9th century)
“The pope received the Slavonic books, consecrated them, and laid them in the church of Saint Mary.”
The Bull Industriae tuae of Pope John VIII (880)
“We command that in this Slavonic tongue the praises and the works of Christ our Lord be sung.”

Key Places

Thessalonica

Great Byzantine city where the two brothers were born, at the crossroads of the Greek and Slavic worlds. From childhood they learned the Slavic language there.

Constantinople

Capital of the Byzantine Empire where Constantine taught and received his training as a “Philosopher.” It was from here that the Moravian mission set out.

Great Moravia

Slavic principality in Central Europe where the brothers carried out their main mission from 863 onward. There they translated the liturgy and trained disciples.

Rome

City where the brothers obtained papal approval of the Slavic liturgy and where Cyril died in 869. He is buried in the Basilica of San Clemente.

Basilica of San Clemente (Rome)

Roman church housing the tomb of Cyril. It has become a place of remembrance for the two saints.

Liens externes & ressources

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See also