Upon the death of Rabbi Chushiel, Rabbenu Nissim ben Jacob,[6] son of Rabbi Yaakov ben Nissim, assumed the leadership of the yeshiva, and mentored Rabbenu Chananel ben Chushiel.[6] At the peak of the yeshiva's prestige, Egyptian communities in Cairo and Alexandria would turn to the scholars of Kairouan, even though they were subject to the authority of the academies in the Land of Israel. In the Kairouan yeshiva, both the Babylonian Talmud and the Jerusalem Talmud were considered of equal halakhic relevance, which can be seen in the works of Rabbi Chananel and Rabbi Nissim, known by their side-by-side comparison of the two Talmuds, often using the Yerushalmi to supplement the Bavli.[3] During that same period, Rabbi Isaac Alfasi also studied in Kairouan, before moving to Fez, Morocco.