Pope Boniface IV (Latin: Bonifatius IV) was Pope from 25 September 608 to his death in 615. He is venerated as a saint in the Roman Catholic Church with a universal feast falling annually on 25 May.
Son of Johannes, "a physician, a Marsian from the province and town of Valeria; he succeeded Boniface III after a vacancy of over nine months". He was consecrated on either 25 August or 15 September in 608. His death is listed as either 8 May or 25 May 615.
In the time of Pope Gregory I, he was a deacon of the Roman Church and held the position of dispensator, that is, the first official in connection with the administration of the patrimonies.
Boniface obtained leave from the Byzantine Emperor Phocas to convert the Pantheon in Rome into a Christian church, and on 13 May 609 (?), the temple erected by Agrippa to Jupiter the Avenger, Venus, and Mars was consecrated by the pope to the Virgin Mary and all the Martyrs. It was the first instance at Rome of the transformation of a pagan temple into a place of Christian worship. Twenty-eight cartloads of sacred bones were said to have been removed from the Catacombs and placed in a porphyry basin beneath the high altar
Boniface had converted his own house into a monastery, where he retired and died. He was buried in the portico of St. Peter's Basilica. His remains were three times removed - in the tenth or eleventh century, at the close of the thirteenth under Boniface VIII, and to the new St. Peter's on 21 October 1603.
Boniface IV is commemorated as a saint in the Roman Martyrology on his feast day, 25 May.