  Despite the conservative tendencies in the thought of his father, Don Isaac insured that his children received educations that included both Jewish and non-Jewish subjects. Rabbi Joseph ben Abraham ibn Hayoun, the leading rabbinic figure in Lisbon, was responsible for teaching religious subjects (e.g., Bible, commentaries, and halakhic works) to Judah and his brothers. As far as non-Jewish works and subjects were concerned, Judah, like most elite Jews of the fifteenth century, would have been instructed in both the medieval Arabo-Judaic tradition (e.g., Maimonides, Averroes), in addition to humanistic studies imported from  Italy.[4]