Todi, Tuscany, Italy
655 at Cherson, Crimea
Martyr, born at Todi on the Tiber, son of Fabricius; elected Pope at Rome, 21 July, 649, to succeed Theodore I; died at Cherson in the present peninsulas of Krym, 16 Sept., 655, after a reign of 6 years, one month and twenty six days, having ordained eleven priests, five deacons and thirty-three bishops. 5 July is the date commonly given for his election, but 21 July (given by Lobkowitz, "Statistik der Papste" Freiburg, 1905) seems to correspond better with the date of his death and reign (Duchesne "Lib. Pont.", I, 336); his feast is on 12 November.The Greeks honor him on 13 April and 15 September, the Muscovites on 14 April. In the hymns of the Office the Greeks style him infallibilis fidei magister because he was the successor of St. Peter in the See of Rome (Nilles, "Calendarium Manuale", Innsbruck, 1896, I, 336).
(Taken From Catholic Encyclopedia)