St. Peter Celestine was founder of the Celestine Order. He was living in a mountain solitude when he was called to Rome by his election to the Pontificate. He was accused of excessive simplicity in public affairs, nor did he deny the truth of this accusation. Other Popes, such as Sts. Martin and Benedict IX had resigned the Papacy; the Thirteenth Century canonists nevertheless, disputed whether it was lawful for the Supreme Pontiff ever to renounce his position.
St. Pudentiana, a Roman virgin, was the daughter of the Senator Pudens, who had been converted by Sts. Peter and Paul. Pudentiana and her sister St. Praxedes, passed their lives in good works.
(Source: The New Roman Missal by Father Lasance).