Judah, meanwhile, moved to Genoa, where he studied in an Italian humanist milieu and probably wrote the first two of his "Dialoghi". There is evidence that he moved from Genoa to Barletta in 1501, where he became a servant of King Frederick of Naples, leaving in 1503 for Venice, where he rejoined his father Dom Isaac. Other sources say that he left Genoa for Naples in 1501 and remained there until 1506. While in Naples, Judah (apparently overlooking the injuries of the past) became the doctor of the Spanish viceroy, Don Gonsalvo of Cordoba, “The Great Captain.”