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Cyril and Methodius

9th-century Byzantine Christian theologians and missionaries

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJun 23, 2026
Entity authorityQ239925 ↗
Source-derived summary

Cyril (Greek: Κύριλλος, romanized: Kýrillos; born Constantine [Greek: Κωνσταντίνος, romanized: Konstantínos]; 826–869) and Methodius (Μεθόδιος, Methódios; born Michael [Greek: Μιχαήλ, romanized: Michaíl]; 815–885) were brothers, Byzantine Christian theologians and missionaries. For their work evangelizing the Early Slavs, they are known as the "Apostles to the Slavs".

They are credited with devising the Glagolitic alphabet, the first alphabet used to transcribe Old Church Slavonic. After their deaths, their pupils continued their missionary work among other Slavs. Both brothers are venerated in the Eastern Orthodox Church as saints with the title of "equal-to-apostles". In 1880, Pope Leo XIII introduced their feast into the calendar of the Roman Rite of the Catholic Church. In 1980, the first Slav pope, Pope John Paul II declared them co-patron saints of Europe, together with Benedict of Nursia.

Early career

Early life

The two brothers were born in Thessalonica, at that time in the Byzantine province of the same name (today in Greece) – Cyril in 827–828, and Methodius in 815–820. According to the Vita Cyrilli ("The Life of Cyril"), Cyril was reputedly the youngest of seven brothers; he was born Constantine, but was given the name Cyril upon becoming a monk in Rome shortly before his death. Methodius was born Michael and was given the name Methodius upon becoming a monk in Polychron Monastery at Mysian Olympus (present-day Uludağ in northwest Turkey).

Editorial summary

Begin with the source’s own compact description: “Cyril and Methodius” is 9th-century Byzantine Christian theologians and missionaries. The dossier treats that line as a proposition to test through Cyril, Methodius and 9th-century, not as a finished interpretation.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1880, 1980—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Cyril, Methodius and 9th-century is the immediate research focus.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 23, 2026. The linked authority identifier is Q239925. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1880 and 1980.

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Source & attribution

This entry incorporates text from “Cyril and Methodius” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.