El Cid

Mural of Saints Cyril and Methodius, 19th century, Troyan Monastery, Bulgaria.jpg

Mural of Saints Cyril and Methodius, 19th century, Troyan Monastery, Bulgaria.

Cyril and Methodius were Byzantine monks learned in Greek, Latin and Hebrew. So they developed the alphabets for the Slavs inclusive the Russians by mixing these 3 aforementioned languages in one system.