Origin and Conversion
By the testimony of St Gregory Palamas, who is the principal early source for his life, Nikephoros was originally a Roman Catholic from the Latin West who travelled to the Byzantine Empire and there converted to the Eastern Orthodox faith. The synaxarion remembers him simply as an Italian, or man of Rome, who embraced Orthodoxy.
After his conversion he settled on Mount Athos and took up the monastic and ascetic life, joining the community of Athonite fathers among whom the practices of inner prayer were cultivated.