Cyril and Methodius
The brothers were both born in Thessalonica. Methodios was born  and died in 885. Cyril was born  and died (under his adopted name Constantine) in 869. Cyril was educated at the university at Constantinople under Photios I of Constantinople. He later taught there when he replaced Photios. Methodios became governor of the province of Opsikion at about the same time.