St. Cyril (died 444) was bishop of Alexandria. A Doctor of the Church, he played a leading role in the controversies over the correct understanding of the person of Jesus Christ. Nothing certain is known concerning Cyril's early years except that he...

827?-869 Greek librarian and missionary, also known as Constantine the Philosopher, who invented Cyrillic script. The youngest child of a Greek father and a Slavic mother, Cyril studied science, music, geography, and languages at the royal school of...

Saint Cyril (Greek: Κύριλλος, Church Slavonic: Кирилъ) (827 - February 14, 869) was a Byzantine Greek[1] monk, scholar, theologian, and linguist. He is best known today for his work in Christianising the Slavs and, with his brother Saint...

Pope Celestine I, his contemporary, dubbed him 'Good Defender of the Catholic Faith'; Anastasius Sinaiticus (7th-cent.) called him 'Seal of the Fathers'; the Greek Church revered his Christology; the Sacred Congregation of Rites (July 28, 1882) titled him 'Teacher of the Church'; for...

SAINT CYRIL OF ALEXANDRIA AND THE CHRISTOLOGICAL CONTROVERSY: ITS HISTORY, THEOLOGY, AND TEXTS. By John McGuckin. Crestwood, N.Y.: St. Vladimir's Seminary, 2004. Pp. xv + 432. $22.95. Just over ten years ago (1994) John McGuckin first published his lucid study of Cyril...

Cyril and Methoudioius had a profound influence on the world by creating their alphabet. These Thesalonian brothers renounced thier family wealth, choosing a spitiritual and intellectual existance. The invention of the alphabet was to better enable them to work in several languages, as they performed their missionary work.