Saints Cyril and Methodius
Saints Cyril and Methodius were brothers who were born in Greece and educated in Constantinople. They were the great apostles of the Faith to the Slavs in southern Russia, in Bohemia and Poland during the ninth century. Though Saint Cyril and Saint Methodius died sixteen years apart, their feasts are celebrated together. They are responsible for the Slav alphabet and for the Slav language. Pope John Paul II made Saint Cyril and Saint Methodius patrons of Europe, along with St. Benedict. They are also patrons of ecumenism and patrons of unity between the Eastern and Western Churches.
Learn more about them here.