Saints Cyril and Methodius
|Saints Cyril and Methodius|
Saints Cyril and Methodius holding Cyrillic alphabet
mural by Bulgarian icon-painter Z. Zograf, 1848, Troyan Monastery
|Equals to the Apostles|
Patrons of Europe
Apostles to the Slavs
|Born||827 and 826 in Thessaloniki, Byzantine Empire (present-day Greece)|
|Died||February 14 869 and 6 April 885|
|Venerated in||Orthodox Church|
Eastern Catholic Churches
|Feast||May 11 (Orthodox Church)|
February 14 (Catholic Church)
|Attributes||depicted together; Eastern bishops holding up a church; Eastern bishops holding an icon of the Last Judgment Often, Cyril is depicted wearing a monastic habit and Methodius vested as a bishop with omophorion.|
|Patronage||Bulgaria, Czech Republic (including Bohemia, and Moravia), Ecumenism, unity of the Eastern and Western Churches, Europe, Slovakia|
Saints Cyril and Methodius (Greek: Κύριλλος και Μεθόδιος, Old Church Slavonic: кѵрилъ и меѳодии ) were two Byzantine Greek  brothers born in Thessaloniki in the ninth century, who became missionaries of Christianity among the Slavs of Great Moravia and Pannonia. Through their work they influenced the cultural development of all Slavic peoples for which they received the title “Apostles to the Slavs.” They are credited with devising the Glagolitic alphabet, the first alphabet used to transcribe the Old Church Slavonic language. The Cyrillic alphabet, which was based on the Glagolitic alphabet, is still used in a number of Slavic and other languages. After their death, their pupils continued their missionary work among other Slavic peoples. Both brothers are venerated in the Eastern Orthodox Church as saints with the title of "Equals to the Apostles." In 1880, Pope Leo XIII introduced their feast into the calendar of the Roman Catholic Church. In 1980, Pope John Paul II declared them Co-patrons of Europe, together with Saint Benedict of Nursia.
The two brothers, Cyril and Methodius were born in Thessaloniki in 827 and 826 respectively to a Byzantine Greek drungarios (a military rank) named Leon. Cyril was reputedly the youngest of seven brothers, according to the Vita Cyrilli ("The Life of Cyril"). Cyril's birth name was Constantine (Greek: Κωνσταντίνος Konstantínos) and he was probably renamed Cyril (Greek: 'Lordly') just before or after his death in Rome.
The two brothers lost their father when Cyril was only fourteen, and their uncle Theoktistos (Greek: Θεόκτιστος) became their protector. Theoktistos was a "Logothetes tou dromou," a powerful Byzantine official, responsible for the postal services and the diplomatic relations of the Empire. He was also responsible, along with the regent Bardas, for initiating a far-reaching educational program within the Empire, culminating in the establishment of the University of Magnaura, where Cyril was to teach. Theoktistos invited (843) Cyril to Constantinople, the capital of the Byzantine Empire, helping him continue his studies at the University there. He also arranged the later placement of Methodius (Greek: Μεθόδιος Methódios) as an abbot in the famous Greek monastery of Polychron (Μονή Πολυχρονίου) in Constantinople.
Photius is said to have been among Cyril’s teachers; Anastasius Bibliothecarius mentions their later friendship, as well as a conflict between them on a point of doctrine. Cyril studied an eclectic variety of fields including astronomy, geometry, rhetoric and music. However, it was in the field of linguistics that Cyril particularly excelled. Besides his native Greek language, he was fluent in Latin, Arabic, Hebrew; according to the Vita Cyrilli, the Byzantine Emperor Michael III claimed that "all Thessalonians speak perfect Slavonic" (ch. 86).
After the completion of his education Cyril took holy orders and became a monk. He seems to have held the important position of chartophylax, or secretary to the patriarch and keeper of the archives, with some judicial functions also. After six months' quiet retirement in a monastery he began to teach philosophy and theology.
The fact that Cyril was a master theologian with a good command of both the Arabic and Hebrew languages made him eligible for his first state mission to the Abbasid Caliph Al-Mutawakkil in order to discuss the principle of the Holy Trinity with the Arab theologian and to tighten the diplomatic relations between the Abbashid Caliphate and the Empire.
Cyril also took an active role in relations with the other two great Judaic, monotheistic religions, Islam and Judaism. He penned fiercely anti-Jewish polemics, perhaps connected with his mission to the Khazar Khaganate, a state located near the Sea of Azov ruled by a Jewish king who allowed Jews, Muslims, and Christians to live peaceably side by side. He also undertook a mission to the Arabs with whom, according to the Vita, he held discussions. He is said to have learned the Hebrew, Samaritan and Arabic languages during this period.
The second mission (860) requested by the Byzantine Emperor Michael III and the Patriarch of Constantinople Photius (a professor of Cyril's at the University and his guiding light in earlier years) was a missionary expedition to the Khazar Khagan in order to prevent the expansion of Judaism there. This mission was unsuccessful, as later the Khagan imposed Judaism to his people as the national religion. It has been claimed that Methodius also accompanied Cyril on the mission to the Khazars, but this is probably a later invention. The account of his life presented in the Latin Legenda claims that he also learned the Khazar language while in Chersonesos, in Taurica (today Crimea).
After his return to Constantinople, Cyril assumed the role of professor of philosophy at the University while his brother had by this time become a significant player in Byzantine political and administrative affairs, and an abbot of his monastery.
Mission to the Slavs
In 862, both brothers were to enter upon the work which gives them their historical importance. That year the Prince Rastislav of Great Moravia requested that the Emperor Michael III and the Patriarch Photius send missionaries to evangelize his Slavic subjects. His motives in doing so were probably more political than religious. Rastislav had become king with the support of the Frankish ruler Louis the German, but subsequently sought to assert his independence from the Franks. He is said to have expelled missionaries of the Roman Church and instead turned to Constantinople for ecclesiastical assistance and, presumably, a degree of political support. The request provided a convenient opportunity to expand Byzantine influence, and the task was entrusted to Cyril and Methodius. Their first work seems to have been the training of assistants. In 863, they began the task of translating the Bible into the language now known as Old Church Slavonic and travelled to Great Moravia to promote it. They enjoyed considerable success in this endeavour. However, they came into conflict with German ecclesiastics who opposed their efforts to create a specifically Slavic liturgy.
For the purpose of this mission, they devised the Glagolitic alphabet, the first alphabet to be used for Slavonic manuscripts. The Glagolitic alphabet was suited to match the specific features of the Slavic language and its descendant alphabet, the Cyrillic Alphabet, is still used by many languages today.
They also translated Christian texts for Slavs into the language that is now called Old Church Slavonic and wrote the first Slavic Civil Code, which was used in Great Moravia. The language derived from Old Church Slavonic, known as Church Slavonic, is still used in liturgy by several Eastern Orthodox and Eastern Catholic churches.
It is impossible to determine with certainty what portions of the Bible the brothers translated. The New Testament and the Book of Psalms seem to have been the first, followed by other lessons from the Old Testament. The Translatio speaks only of a version of the Gospels by Cyril, and the Vita Methodii only of the evangelium Slovenicum, though other liturgical selections may also have been translated.
Nor is it known for sure which liturgy—that of Rome or that of Constantinople—they took as a source. They may well have used the Roman, as suggested by liturgical fragments which adhere closely to the Latin type. This view is confirmed by the "Prague Fragments" and by certain Old Glagolitic liturgical fragments brought from Jerusalem to Kiev and there discovered by Saresnewsky–probably the oldest document for the Slavonic tongue; these adhere closely to the Latin type, as is shown by the words "mass," "preface," and the name of one Felicitas. In any case, the circumstances were such that the brothers could hope for no permanent success without obtaining the authorization of Rome.
Journey to Rome
In 867, Pope Nicholas I invited the brothers to Rome. Their evangelizing mission in Moravia had by this time become the focus of a dispute with Theotmar, the Archbishop of Salzburg and bishop of Passau, who claimed ecclesiastical control of the same territory and wished to see it use the Latin liturgy exclusively. Travelling with the relics of Saint Clement and a retinue of disciples, they passed through Pannonia (the Balaton Principality), where they were well received by Prince Koceľ (Kocelj, Kozel), finally arriving in Rome in 868 where they were warmly received. This was partly due to the relics of Saint Clement; while the rivalry with Constantinople, as to the jurisdiction over the territory of the Slavs would incline Rome to value the brothers and their influence.
The brothers were praised for their learning and cultivated for their influence in Constantinople. Anastasius would later call Cyril "the teacher of the Apostolic See." Their project in Moravia found support from Pope Adrian II, who formally authorized the use of the new Slavic liturgy. The ordination of the brothers' Slav disciples was performed by Formosus and Gauderic, two prominent bishops, and the newly made priests officiated in their own tongue at the altars of some of the principal churches. Feeling his end approaching, Cyril put on the monastic habit and died 50 days later (February 14, 869). There is practically no basis for the assertion of the Translatio (ix.) that he was made a bishop; and the name of Cyril seems to have been given to him only after his death.
Methodius continued the work among the Slavs alone; owing to the political circumstances in Great Moravia, where Rastislav had been taken captive by his nephew Svatopluk, then delivered over to Carloman, and condemned in a diet of the empire at the end of 870, he worked in Pannonia (in the Balaton Principality).
This activity in Pannonia, however, made a conflict inevitable with the German episcopate, and especially with the bishop of Salzburg, to whose jurisdiction Pannonia had belonged for 75 years. In 865 Bishop Adalwin is found exercising all Episcopal rights there, and the administration under him was in the hands of the archpriest Riehbald. The latter was obliged to retire to Salzburg, but his superior was naturally disinclined to abandon his claims. Friendly relations had been established with Koceľ on the journey to Rome, from which Methodius sought support. The Vita asserts that Koceľ sent him thither with an honorable escort to receive Episcopal consecration.
The letter given as Adrian's in chap. viii., with its approval of the Slavonic mass, is a pure invention. It is noteworthy that the pope named Methodius not bishop of Pannonia, but archbishop of Sirmium, thus superseding the claims of Salzburg by an older title. The statement of the Vita that Methodius was made bishop in 870 and not raised to the dignity of an archbishop until 873 is contradicted by the brief of Pope John VIII, written in June, 879, according to which Adrian consecrated him archbishop; John includes in his jurisdiction not only Great Moravia and Pannonia, but Serbia as well.
Methodius’ final years
The archiepiscopal claims of Methodius were considered such an injury to the rights of Salzburg that he was forced to answer for them at a synod held at Regensburg in the presence of King Louis. The assembly, after a heated discussion, declared the deposition of the intruder, and ordered him to be sent to Germany, where he was kept a prisoner for two and a half years. In spite of the strong representations of the Conversio Bagoariorum et Carantanorum, written in 871 to influence the pope, though not avowing this purpose, Rome declared emphatically for Methodius, and sent a bishop, Paul of Ancons, to reinstate him and punish his enemies, after which both parties were commanded to appear in Rome with the legate.
The papal will prevailed, and Methodius secured his freedom and his archiepiscopal authority over both Great Moravia and Pannonia, though the use of Slavonic for the mass was still denied to him. His authority was restricted in Pannonia when after Koceľ's death the principality was administered by German nobles; but Svatopluk now ruled with practical independence in Great Moravia, and expelled the German clergy. This apparently secured an undisturbed field of operation for Methodius; and the Vita (x.) depicts the next few years (873–879) as a period of fruitful progress. Methodius seems to have disregarded, wholly or in part, the prohibition of the Slavonic liturgy; and when Frankish clerics again found their way into the country, and the archbishop's strictness had displeased the licentious Svatopluk, this was made a cause of complaint against him at Rome, coupled with charges regarding the Filioque.
Methodius vindicated his orthodoxy at Rome, the more easily as the creed was still recited there without the Filioque, and promised to obey in regard to the liturgy. The other party was conciliated by giving him a Swabian, Wiching, as his coadjutor. When relations were strained between the two, John VIII steadfastly supported Methodius; but after his death (December 882) the archbishop's position became insecure, and his need of support induced Goetz to accept the statement of the Vita (xiii.) that he went to visit the Eastern emperor.
It was not, however, until after Methodius' death, which is placed, though not with certainty, on 8 April, 885, that the animosity erupted into an open conflict. Gorazd, whom Methodius had designated as his successor, was not recognized by Pope Stephen V. The same Pope forbade the use of the Slavic liturgy and placed the infamous Wiching as Methodius' successor. The latter exiled the disciples of the two brothers from Great Moravia in 885. They fled to the First Bulgarian Empire, where they were welcomed and commissioned to establish theological schools. There they devised the Cyrillic Alphabet on the basis of the Glagolitic Alphabet. Cyrillic gradually replaced Glagolitic as the alphabet of the Old Church Slavonic (Old Bulgarian) language, which became the official language of the Bulgarian Empire and later spread to the Eastern Slav lands of Kievan Rus'. Cyrillic eventually spread throughout most of the Slavic world to become the standard alphabet in the Orthodox Slavic countries. Hence, Cyril and Methodius' efforts also paved the way for the spread of Christianity throughout Eastern Europe.
Invention of the Glagolitic
The Glagolitic alphabet or Glagolitsa, based primarily on the Greek uncial writing of the ninth century, is the oldest known Slavic alphabet and was created by the two brothers, in order to translate the Bible and other texts into the Slavic languages. The alphabet was then used in Great Moravia between 863 (with the arrival of Cyril and Methodius) and 885 (with the expulsion of their students) for government and religious documents and books, and at the Great Moravian Academy (Veľkomoravské učilište) founded by Cyril. Followers of Cyril and Methodius were educated there, by Methodius himself among others. The alphabet has been traditionally attributed to Cyril. This view is supported by the papal letter Industriae tuae (880) approving the use of Old Church Slavonic, which says that the alphabet was "invented by Constantine the Philosopher." The term invention does not exclude the possibility that the brothers may have made use of earlier letters, but implies only that before that time the Slavic languages had no distinct script of their own.
The early Cyrillic alphabet was a simplification of the Glagolitic alphabet which more closely resembled the Greek alphabet. It has been attributed to Saint Clement of Ohrid, a disciple of Saints Cyril and Methodius. However, recent studies have suggested that the Cyrillic alphabet was more likely developed at the Preslav Literary School in northeastern Bulgaria in the early tenth century and was named so in honor of Saint Cyril.
Slavic origin hypothesis
A popular opinion among Slavic nations holds that Cyril and Methodius were themselves of Slavic background. Theories and positions of authors who have maintained such views range from Greek father and Slavic mother to purely Slavonic (or, more specifically, Bulgarian) origin. "It is a long lasting dispute: what was the ethnicity of Constantine-Cyril and Methodius—Greek or Bulgarian?".
- The Bulgarian (or, in a wider form, Slavonic) version is probably the first explicitly documented one. It is based primarily on the evidence of the short variant of St. Cyril's biography (so-called "Успение Кириллово" (Uspenie Kirillovo) - "Assumption of St. Cyril"), an Old Slavonic text saying that Saint Cyril "родомъ сыи блъгаринь" (rodomŭ syi blŭgarinĭ, "being Bulgarian by birth"). Two copies of the text (one belongs to the beginning of the fifteenth century, another from late fifteenth - early sixteenth century) are published in: Боню Ст. Ангелов (Boniu St. Angelov), Из старата българска, руска и сръбска литература (From old Bulgarian, Russian and Serbian literature), (Sofia: 1978), 7-10, and 13-16. This version is popular mostly among Bulgarian scholars. Critics say that "Assumption of St. Cyril" is not a very reliable source: it is a relatively late evidence, and it contains a lot of other dubious statements. 
- The mixed origin version stipulates that the brothers were born to a Greek father and a Slavic mother. One argument for this version (and/or Slavonic origin version as well), the following evidence from the earliest and most detailed Cyrilo-Methodian source—"Life of St. Cyril": "as a suckling, he did not accept the foster-mother, and only the milk of his own mother could feed him." As a symbolic presage of his further life—service for the Slavonic people—it can be interpreted as service to the people of his mother (see: Dinekov and Likhachyov).
- One more point of view is popular in Slavonic literature and is shared by Florya himself: "при имеющемся состоянии источников вопрос об этническом происхождении Кирилла и Мефодия определенно решен быть не может" (under existing state of the primary sources, the question about a Slavic origin of Cyril and Methodius cannot be solved determinately—Florya, , 205). Or: "станем поэтому в вопросе о национальности Кирилла и Мефодия на более мудрые позиции и признаем их славянами по языку и самосознанию, не заглядывая в вопрос об их крови—славянской, греческой или иной" (therefore, let us stand in the problem of Cyril and Methodius ethnicity on a wiser position: let us confess them Slavs in language and in self-consciousness, not looking into the question of their blood—Slavonic, Greek, or other—Dinekov and Likhachyov, 9).
Saints Cyril and Methodius Day
Cyril was canonized as a saint by the Eastern Orthodox Church, with the Roman Catholic Church canonizing him separately in 1880 together with Methodius. The two brothers are known as the "Apostles of the Slavs" and are still highly regarded by Catholics and Orthodox Christians. Cyril's feast day is celebrated on February 14 (Catholic Church) or May 11 (Orthodox Church). The two brothers were declared "Patrons of Europe" in 1980  . Saint Cyril Peak on Livingston Island in the South Shetland Islands, Antarctica is named for Cyril.
Saints Cyril and Methodius Day is a holiday, usually celebrated on May 24 in countries which observe Eastern Orthodox tradition, and on July 5 in countries that observe Roman Catholic tradition. It commemorates the creation of the Slavic Glagolitic and Cyrillic alphabets by the brothers Saints Cyril and Methodius. The celebration also commemorates the introduction of literacy and the preaching of the gospels in the Slavonic language by the brothers.
According to old Bulgarian chronicles, the day of the holy brothers used to be celebrated ecclesiastically as early as elecenth century. The first recorded secular celebration of the Saints Cyril and Methodius Day as the "Day of the Bulgarian script," as it is traditionally accepted by Bulgarian science, was held in the town of Plovdiv on May 11, 1851, when a local Bulgarian school was named "Saints Cyril and Methodius." Both tributes were initiated by the prominent Bulgarian enlightener Naiden Gerov, although an Armenian traveller mentioned his visit at a "celebration of the Bulgarian script" in the town of Shumen on May 22, 1803.
The day is now celebrated as a public holiday in the following countries:
- In Bulgaria it is celebrated on May 24 and is known as the Bulgarian Education and Culture, and Slavonic Literature Day (Bulgarian: Ден на българската просвета и култура и на славянската писменост), a national holiday celebrating Bulgarian culture and literature as well as the alphabet. It is also known as Alphabet, Culture, and Education Day (Bulgarian: Ден на азбуката, културата и просвещението).
- In the Republic of Macedonia, it is celebrated on May 24 and is known as the Saints Cyril and Methodius, Slavonic Enlighteners' Day (Macedonian: Св. Кирил и Методиј, Ден на сесловенските просветители), a national holiday. Macedonian Government took the decision for the statute of national holiday in October 2006 and Macedonian Parliament passed a corresponding law in the beginning of 2007. Before that it was celebrated only in the schools. It is also known as the day of the "Solun Brothers" (Slavic Macedonian: Солунските браќа).
- In the Czech Republic it is celebrated on July 5 as Slavic Missionaries Cyril and Methodius Day (Czech: Den slovanských věrozvěstů Cyrila a Metoděje).
- In Russia, it is celebrated on May 24 and is known as the Slavonic Literature and Culture Day (Russian: День славянской письменности и культуры), celebrating Slavonic culture and literature as well as the alphabet. Its celebration is ecclesiastical, and it is not a public holiday in Russia.
- In Slovakia it is celebrated on July 5 as St. Cyril and Metod Day. (Slovak: Sviatok svätého Cyrila a Metoda)
The saints' feast day is celebrated by the Eastern Orthodox Church on May 11 and by the Roman Catholic Church and the Anglican Church on 14 February as Saints Cyril and Methodius Day. Lutheran Churches commemorate the two saints either on 14 February or 11 May. It is a public holiday in Bulgaria, the Czech Republic, the Republic of Macedonia, and Slovakia; it is celebrated in Russia as a holiday associated with the two brothers, who are considered patrons of learning and education.
In the Czech lands and Slovakia, the two brothers were originally commemorated on March 9, but Pope Pius IX changed this date to July 5. Today, the St. Cyril and Methodius Day, believed to be the date of the arrival of the two brothers to Great Moravia in 863, is a national holiday both in the Czech Republic and Slovakia.
St. Cyril Peak and St. Methodius Peak on Livingston Island in the Tangra Mountains, South Shetland Islands, Antarctica are named for the two brothers.
Basilica of Ss. Cyril and Methodius in Danville, Pennsylvania (the only Roman Catholic basilica dedicated to Ss. Cyril & Methodius in the world) is the Motherhouse chapel of the Sisters of Ss. Cyril and Methodius, a Roman Catholic women's religious community of pontifical rite dedicated to apostolic works of ecumenism, education, evangelization, and elder care.
- Terry Jones, "Methodius" Patron Saints Index  accessdate 2007-02-18
- New Church Slavonic: Кѷрі́ллъ и҆ Меѳо́дїй (Kỳrill” i Methodij).
In later national Cyrillic Slavonic alphabets:
- Belarusian: Кірыла і Мяфодзій (Kiryła i Miafodzij)
- Bulgarian: Кирил и Методий (Kiril i Metodij)
- Macedonian: Кирил и Методиј (Kiril i Metodij)
- Russian: Кирилл и Мефодий (Kirill i Mefodij), pre-1918 spelling: Кириллъ и Меѳодій (Kirill” i Methodij)
- Serbian: Ћирило и Методије (Ćirilo i Metodije)
- Ukrainian: Кирило і Мефодій (Kyrylo i Mefodij)
- Columbia Encyclopedia, Sixth Edition. 2001-05, s.v. "Cyril and Methodius, Saints"
- Encyclopedia Britannica, Encyclopedia Britannica Incorporated, Warren E. Preece - 1972, 846, s.v., "Cyril and Methodius, Saints" and "Eastern Orthodoxy, Missions ancient and modern"
- David H. Levinson, 1991, Encyclopedia of World Cultures, 239, s.v., "Social Science"
- Eric M. Meyers, The Oxford Encyclopedia of Archaeology in the Near East. (1997), 151
- Lunt, Slavic Review (June, 1964): 216
- Roman Jakobson, "Crucial problems of Cyrillo-Methodian Studies." in Selected Writings: Early Slavic Paths and Crossroads, Volume 6 Part 1 (Mouton De Gruyter, 1985. ISBN 3110106051)
- Leonid Ivan Strakhovsky, (ed.) A Handbook of Slavic Studies. (Harvard University Press, (1944) 1949. ASIN: B000AZDZRA), 98
- Egregiae Virtutis, apostolic letter of Pope John Paul II, December 31, 1980 (Latin)
- Encyclopedia Britannica, "Cyril and Methodius, Saints," O.Ed., 2008
- Paul M. Barford. The Early Slavs: Culture and Society in Early Medieval Eastern Europe. (Ithaca, New York: Cornell University Press, 2001. ISBN 0801439779)
- П. Н. Динеков, Д. С. Лихачёв (P. N. Dinekov, D. S. Likhachyov), Дело Константина-Кирилла Философа и его брата Мефодия (The work of Constantine-Cyril the Philosopher and his brother Methodius), in: Жития Кирилла и Мефодия. Факсимильное издание (Lives of Cyril and Methodius. Fac-simile edition), (Moscow-Sofia: 1986), 8
- Б. Н. Флоря (B. N. Florya), Сказания о начале славянской письменности (Narrations on the beginning of Slavonic written language), 2nd ed., (St. Petersburg: 2000 ISBN 5893293282), 203-204
- Epistola Enciclica. Retrieved May 29, 2008.
- "История на България," Том 6 Българско Възраждане 1856-1878, Издателство на Българската академия на науките, София, 1987, стр. 106 (in Bulgarian; in English: "History of Bulgaria," Volume 6 Bulgarian Revival 1856-1878, (Publishing house of the Bulgarian Academy of Sciences, Sofia: 1987), 106.
- Jubilee speech of the Academician Ivan Yuhnovski, Head of the Bulgarian Academy of Sciences, held on May 23, 2003, published in Information Bulletin of the Bulgarian Academy of Sciences, 3(62), (June 27, 2003) Sofia, (in Bulgarian).
- Announcement about the eleventh session of the Macedonian Government on 24 October 2006 from the official site of the Macedonian Government (in Macedonian).
ReferencesISBN links support NWE through referral fees
- Barford, Paul M. (2001). The Early Slavs: Culture and Society in Early Medieval Eastern Europe. Ithaca, New York: Cornell University Press. ISBN 0801439779.
- Lacko, Michael. Saints Cyril and Methodius. Rome: Slovak Editions "Sts. Cyril and Methodius," 1969. OCLC 2804347
- Б. Н. Флоря (B. N. Florya), Сказания о начале славянской письменности (Narrations on the beginning of Slavonic written language), 2nd ed., St. Petersburg: 2000. ISBN 5893293282, 203-204
- Potocek, Cyril J. Saints Cyril & Methodius Apostles. P. J. KENNEDY & SONS, 1941. ASIN: B000PYK5L0
- Strakhovsky, Leonid Ivan. (ed.) A Handbook of Slavic Studies. Harvard University Press, (1944) 1949. ASIN: B000AZDZRA
- This article includes content derived from the Schaff-Herzog Encyclopedia of Religious Knowledge, 1914, which is in the public domain.
All links retrieved December 22, 2022.
- Slavorum Apostoli by Pope John Paul II
- "Cyril and Methodius, Saints" article in Encyclopædia Britannica.
- Sts Cyril and Methodius in the "Catholic Encyclopedia"
- "Equal to Apostles SS. Cyril and Methodius Teachers of Slavs", by Prof. Nicolai D. Talberg
- Grande Munus On Saints Cyril and Methodius
- Cyril and Methodius at orthodoxwiki
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