Hyginus was a Greek-born bishop of Rome who served as pope from roughly 138 until his death around 142. During his brief leadership, he is credited with organizing the ecclesiastical hierarchy and establishing the specific roles and prerogatives of the clergy. He also introduced the practice of appointing baptismal parents to support new Christians throughout their lives. Although some traditions suggest he died as a martyr, historical records do not confirm this, and he was ultimately buried on Vatican Hill near the tomb of Saint Peter.