The Aleppo Codex, now known in Hebrew as Keter Aram Tsoba, is the oldest and most famous manuscript of the Bible. Written in Tiberias in the year 920, and annotated by Aaron ben Asher, it has become the most authoritative Biblical text in Jewish culture. The most famous halachic authority to rely on it was Maimonides, in his exposition of the laws governing the writing of Torah scrolls in his codification of Jewish law (Mishneh Torah).