Eleutherius was an early Christian bishop and martyr who lived during the late first and early second centuries. Born in Rome around 90, he was raised in the faith by his mother, Anthia. According to tradition, he rose through the ecclesiastical ranks quickly, becoming a deacon at 16, a priest at 18, and a bishop of Illyricum by age 20. He is remembered for his efforts to convert many people to Christianity before facing martyrdom under the reign of Emperor Hadrian.