“EVERYONE RELIED ON IT.” Maimonides (1138–1204), the great authority on Jewish law and philosophy, made good use of the Aleppo Codex when it was in Egypt. The manuscript served as a reference text for his magnum opus, the Mishneh Torah. Maimonides also used it in writing his own Torah scroll. As he reported, “Everyone relied on it, because [Aharon] Ben Asher had reviewed it.” In 1375, a descendant of Maimonides, Rabbi David Ben Yehoshua, carried many manuscripts from Egypt to Syria. The codex may have been among them.