Peter of Morone was the name of Pope Celestine V before he was elected to be a successor of Saint Peter. He spent only five months as Pope. He then resigned because of his humility and his desire to return to the life of a Benedictine hermit. There has been no Pope named Peter except the first one. As Pope, Peter Celestine is called Pope Celestine V. As a saint, he is called Saint Peter Celestine.