– Pope Saint Celestine I was born in Rome, Italy.
– He was a Roman and is supposed to have been a near relative of the Roman Emperor Valentinian III.
416 – He is spoken of as Celestine the Deacon.
431 – He did not attend personally, he sent delegates to the Council of Ephesus in which the Nestorians were condemned.
– Four letters written by him on that occasion, all dated March 15, together with a few others, to the African bishops, to those of Illyria, of Thessalonica, and of Narbonne, are extant in retranslations from the Greek, the Latin originals having been lost.
– He sent Palladius to Ireland to serve as a bishop.
432 – He died on the 6th of April. He was buried in the cemetery of St. Priscilla in the Via Salaria, but his body, subsequently moved, lies now in the Basilica di Santa Prassede.