St. Cyril
Asked to bring the Gospel to people whose language had never been written down, he built them an alphabet and translated the Scriptures and the liturgy into it, then defended in Rome their right to pray in their own tongue against churchmen who insisted on Hebrew, Greek and Latin.
Born 827 · Died 869 · Canonized
Born at Thessalonica in 827 and died at Rome on 14 February 869. NEITHER FIGURE IS AS SIMPLE AS IT LOOKS, and the same three documents that settle the first leave his brother’s birth unsettled. THE BIRTH YEAR IS THE ONE YEAR ALL THREE SOURCES ALLOW. The Catholic Encyclopedia says he and his brother were “born in Thessalonica, in 827 and 826 respectively”. Benedict XVI says he “was born in Thessalonica to Leo, an imperial magistrate, in 826 or 827”. The encyclical Slavorum Apostoli says he “was born in 827 or 828”. Two of the three give a pair of years rather than one, and 827 is the only year that appears in all three, so that is what this record prints. THE DEATH DAY IS A THREE-TO-ONE. Three documents give 14 February 869 — the apostolic letter Egregiae Virtutis in Latin and Italian, the encyclical, and Benedict XVI, who writes “He died on 14 February 869.” The Catholic Encyclopedia alone says “He died in Rome, 4 Feb., 869.” The record follows the three and reports the fourth. No age at death is recorded here, because only the year of his birth is known.
Cyril was born at Thessalonica in 827, the youngest of seven children of an imperial magistrate called Leo, and he was baptized Constantine. He learned Slavonic as a boy. At fourteen he was sent to Constantinople, where he studied under Photius and was a companion of the young emperor.
He turned down a good marriage, was ordained, and became librarian at the patriarch's church. Wanting to be left alone to think, he hid in a monastery; he was found six months later and put to teaching philosophy, which he did so well that people called him the Philosopher for the rest of his life.
He and his elder brother Methodius were sent to the Khazars in the Crimea, and then, at the request of Prince Rastislav, to Great Moravia. Rastislav had asked the emperor for someone who could explain the Christian faith to his people in their own language. Slavonic had never been written down, so before they went Cyril made an alphabet for it — the Glagolitic — and began translating the Scriptures and the liturgy into it. An altered form of that alphabet is called Cyrillic after him.
Frankish clergy already working in Moravia objected, and in 867 the brothers set out for Rome to answer them. On the way they stopped at Venice and argued with men who held that God could only be praised in the three languages written on the cross: Hebrew, Greek and Latin. Cyril said flatly that God wanted every people to praise him in its own.
In Rome the pope agreed, and had the Slavonic books laid on an altar at St Mary Major. Cyril fell seriously ill there. He became a monk, taking the name he is known by, asked his brother not to abandon Moravia, and died on 14 February 869. He is buried in the church of San Clemente in Rome.
What they carried
He gave up a marriage and a court future to be ordained, then hid in a monastery to escape the teaching post that had made him famous. In Venice and in Moravia he had to argue that Slavs might hear the Gospel in their own language, against clergy who said only three were allowed.
Patron of
- Europeformal
State of life
monk · priest · missionary · teacher
Themes
questions and study · writing · travel · preaching · family
John Paul II, Slavorum Apostoli — an encyclical on Cyril and Methodius (1985)
- FOUR DOCUMENTS CARRY THIS LIFE AND THREE OF THEM ARE PAPAL, WHICH IS UNUSUAL FOR A MAN OF THE NINTH CENTURY. John Paul II’s encyclical Slavorum Apostoli of 2 June 1985 is devoted entirely to the two brothers and carries the fullest account of both. His apostolic letter Egregiae Virtutis of 31 December 1980 recites their lives before declaring the patronage. Benedict XVI’s General Audience of 17 June 2009 is the closest thing to a straight biography of each. The Catholic Encyclopedia article “Sts. Cyril and Methodius” is the fourth, and it is the one that stands apart at three separate points — see the refs on his dates and on whether he was made a bishop. Every document is held for both brothers together, because no source treats either of them alone. https://www.vatican.va/content/john-paul-ii/en/encyclicals/documents/hf_jp-ii_enc_19850602_slavorum-apostoli.html
- HIS BIRTH YEAR IS THE ONE YEAR THREE SOURCES ALL ALLOW, AND HIS BROTHER’S IS NOT — the same documents, read the same way, settle one and refuse the other. On him the encyclopedia says he and Methodius were “born in Thessalonica, in 827 and 826 respectively”; Benedict XVI says “in 826 or 827”; the encyclical says he “was born in 827 or 828”. Only 827 satisfies all three. On Methodius the same three give 826, “about 815”, and “between 815 and 820”, which have no year in common at all, so that record prints no birth year. https://www.newadvent.org/cathen/04592a.htm
- HE DIED ON 14 FEBRUARY 869 AND ONE SOURCE SAYS THE FOURTH. Three documents give the fourteenth: Benedict XVI — “He died on 14 February 869.” — the encyclical, which has him gravely ill in Rome and says he “scarcely had time to take religious vows and put on the monastic habit” before he died “on 14 February 869 in Rome”, and the apostolic letter, in Latin “die nempe XIV Februarii, anno DCCCLXIX” and in Italian “14 febbraio 869”. The Catholic Encyclopedia says “He died in Rome, 4 Feb., 869.” THE CALENDAR IS EFFECTIVELY A FOURTH VOICE, and the encyclical says why: after the Second Vatican Council “the feast was transferred to 14 February, which from the historical point of view is the date of the heavenly birthday of Saint Cyril”. The day the Church keeps the two brothers is the day this man died. https://www.vatican.va/content/john-paul-ii/en/encyclicals/documents/hf_jp-ii_enc_19850602_slavorum-apostoli.html
- WHETHER HE WAS EVER MADE A BISHOP: ONE SOURCE SAYS YES, EVERYTHING ELSE SAYS NO, AND THE CALENDAR SETTLES IT. The Catholic Encyclopedia says Pope Adrian II “commended their missionary activity, sanctioned the Slavonic Liturgy, and ordained Cyril and Methodius bishops”. No other held document does. Benedict XVI has only Methodius “ordained a Bishop” and has Cyril, dying, becoming a monk. The encyclical has Methodius “Consecrated Archbishop for the territory of the ancient Diocese of Pannonia” and has Cyril taking religious vows and the monastic habit at the very end. AND THE CHURCH’S OWN CALENDAR NAMES THEM SEPARATELY ON THEIR SHARED DAY: “Ss Cyril, monk,and Methodius, Bishop,”. The United States bishops’ calendar for 2026 prints it the same way — “Saints Cyril, Monk, and Methodius, Bishop”. He is a monk in this record and not a bishop. https://www.liturgyoffice.org.uk/Calendar/Universal/FebUC.shtml
- THE FEAST IS 14 FEBRUARY, and it is the two brothers together. The universal calendar held here, published by the Liturgy Office of the Bishops’ Conference of England and Wales, prints “Ss Cyril, monk,and Methodius, Bishop,” against 14 in February and grades it “memorial”. The United States bishops’ calendar for 2026 corroborates the day, the grade and the two states of life from a second conference: “Saints Cyril, Monk, and Methodius, Bishop”, Memorial. https://www.liturgyoffice.org.uk/Calendar/Universal/FebUC.shtml
- HE IS A CO-PATRON OF EUROPE BY A HELD DECLARING ACT, WHICH IS RARE IN THIS CORPUS. John Paul II’s apostolic letter Egregiae Virtutis, given at Rome on 31 December 1980, exists to do this and says so in its own title: “CON LA QUALE I SANTI CIRILLO E METODIO VENGONO PROCLAMATI COMPATRONI D’EUROPA”. The operative sentence, in the Latin it was promulgated in, is: “Itaque certa scientia ac matura deliberatione Nostra deque apostolicae potestatis plenitudine harum Litterarum vi perpetuumque in modum Sanctos Cyrillum et Methodium totius Europae apud Deum caelestes Compatronos constituimus ac declaramus, omnibus adiectis honoribus ac privilegiis Liturgicis, quae praecipuis locorum Patronis rite competunt.” The letter gives its reason: Benedict had been made patron of Europe by Paul VI in 1964, and John Paul II judged that “questa protezione nei riguardi di tutta l’Europa sarà meglio messa in risalto” if the merits of the two brothers from Thessalonica were joined to his. NINETEEN YEARS LATER HE USED THE SAME FORMULA AGAIN AND CONFIRMED THIS ACT IN DOING SO, adding Bridget of Sweden, Catherine of Siena and Teresa Benedicta of the Cross as Co-Patronesses and describing what he was completing: “what I did on 31 December 1980 when I declared Co-Patrons of Europe, along with Saint Benedict, two Saints of the first millennium, the brothers Cyril and Methodius, pioneers of the evangelization of the East”. https://www.vatican.va/content/john-paul-ii/la/apost_letters/1980/documents/hf_jp-ii_apl_31121980_egregiae-virtutis.html
- HE WAS NEVER FORMALLY CANONIZED, AND NOTHING HELD SAYS OTHERWISE. SCOPE OF THE CHECK, when this was run on 1 September 2026: every document held for this record was searched for “canoniz” and its Italian and Latin forms, in every edition. There are no occurrences at all. He is a saint by ancient cultus, which is the ordinary case for the ninth century — formal canonization did not yet exist as a process — and the Church has kept his day since Leo XIII put it in the universal calendar in 1880.
- THE ALPHABET HE MADE IS NOT THE ONE NAMED AFTER HIM, and both papal sources are careful about it. Benedict XVI: the need for characters closer to the spoken language was clear, “so it was that the Glagolitic alphabet came into being”, and “Subsequently modified, it was later designated by the name “Cyrillic”, in honour of the man who inspired it.” Francis tells the same story as an exchange: Cyril asked whether the Slavs had an alphabet, was told they did not, and answered “Who can write a speech on water?” — “So, he invented the Glagolitic alphabet.” The encyclical calls it “a new alphabet, devised by Constantine the Philosopher and perfectly adapted to the sounds of that language”, and says the Cyrillic developed later in Bulgaria, around Saint Clement of Okhrid. https://www.vatican.va/content/benedict-xvi/en/audiences/2009/documents/hf_ben-xvi_aud_20090617.html
- WHAT HE ARGUED AT VENICE, WHICH IS THE SCENE THIS RECORD LEANS ON HARDEST. Benedict XVI: on the way to Rome in 867 the brothers stopped at Venice, “where they had a heated discussion with the champions of the so-called “trilingual heresy” who claimed that there were only three languages in which it was lawful to praise God: Hebrew, Greek and Latin”. Francis puts the objection in the mouths of its holders — God can be praised “only in the three languages written on the cross: Hebrew, Greek and Latin” — and Cyril’s answer plainly: “God wants all people to praise him in their own language.” His dying prayer in Rome asks the same thing: “Free them from the heresy of the three languages, gather them all in unity”. https://www.vatican.va/content/benedict-xvi/en/audiences/2009/documents/hf_ben-xvi_aud_20090617.html
- WHY HE WENT TO MORAVIA AT ALL, IN THE WORDS OF THE MAN WHO ASKED. Two documents quote Prince Rastislav’s request to the Emperor Michael III and they do not quote it alike. Benedict XVI has: “Since our people rejected paganism”, Ratislav wrote, “they have embraced the Christian law; but we do not have a teacher who can explain the true faith to us in our own language”. The encyclical has him ask for “a Bishop and teacher ... able to explain to them the true Christian faith in their own language”. The two agree on the request and differ in their wording of it, so this record reports what was asked and quotes neither. https://www.vatican.va/content/john-paul-ii/en/encyclicals/documents/hf_jp-ii_enc_19850602_slavorum-apostoli.html
- HE IS BURIED IN ROME AND HIS BROTHER IS NOT, WHICH IS WHY THE TWO RECORDS END DIFFERENTLY. Egregiae Virtutis: “A Roma concluse la sua vita Cirillo (14 febbraio 869) e fu sepolto nella Chiesa di san Clemente”. Francis, preaching in 2023, says the relics are there still: “his relics are still venerated here in Rome, in the Basilica of Saint Clement”. He had brought relics to Rome himself — those of Pope Clement I, found with Methodius in the Crimea — and the encyclical says the two brothers carried them west and “were able to bring them solemnly to Rome and present them to Pope Hadrian II”. https://www.vatican.va/content/john-paul-ii/la/apost_letters/1980/documents/hf_jp-ii_apl_31121980_egregiae-virtutis.html