Simplicius was the bishop of Rome who served from 468 until his death in 483. Born in Tivoli, he led the Church during the collapse of the Western Roman Empire, a period marked by the rise of Odoacer. Throughout his leadership, he worked to uphold the theological decisions of the Council of Chalcedon, specifically targeting the Eutychian heresy. He also managed the administrative stability of Rome as Germanic incursions increased, ensuring the city remained under the bishop's influence despite political shifts.