Celestine I was a 5th-century pope who led the Roman Church from 422 until his death in 432. Born in Rome, he served as a deacon before his elevation to the papacy. His leadership was defined by a vigorous defense of orthodoxy, as he worked to suppress various theological movements that he considered heretical. He is remembered for his efforts to maintain traditional doctrines and for his active role in addressing religious disputes across the Mediterranean and Western Europe.