Zosimus was the bishop of Rome from 417 until his death in late 418. Born in Mesoraca, he led the Church during a period marked by significant theological and jurisdictional tensions. His leadership was characterized by his involvement in disputes regarding the authority of the See of Arles in Gaul and his initial hesitation to condemn Pelagianism. Despite these complexities, he is recognized as a saint in several Christian traditions, including the Catholic, Orthodox, and Anglican churches.