Memorial of Saints Cyril and Methodius; Ninth Century brothers in a part of Greece inhabited by many Slavs; they became missionaries, teachers, and patrons of the Slavic peoples; when the Duke of Moravia requested political independence and ecclesiastical autonomy, it changed the lives of Cyril and Methodius; Cyril invented an alphabet; together they translated the Gospels, the psalter, Paul's letters, and the liturgical books into Slavonic; Cyril and Methodius journeyed to Rome, and saw their Slavonic liturgy approved by Pope Adrian II; Cyril, long an invalid, died in Rome 50 days after taking the monastic habit; Methodius continued mission work for 16 more years; they were named co-patrons of Europe by Pope John Paul II