Cornelius was the bishop of Rome from 251 to 253, serving during a turbulent era of Roman persecution. He led the church through a significant schism regarding how to reintegrate members who had performed pagan sacrifices to avoid death. While the Novatianists argued these individuals should be permanently excluded, Cornelius advocated for their readmission through penance. His leadership helped stabilize the Roman church, which at the time supported a vast community of clergy and those in need.