Aleppo Codex

The Aleppo Codex dates from around AD 925, and is older than the Codex Leningradensis.

The Aleppo Codex was the oldest preserved manuscript of the complete Hebrew Bible. But part of the codex was lost in the 20th century. In 1947 the synagogue of Aleppo was destroyed by attacks on the Jews. At that time, part of the codex that was kept in the synagogue was also lost. Now almost the whole text of the Pentateuch is missing.
Since 1958 the Aleppo Codex has been kept in Jerusalem, in the Israel Museum.

According to many scholars, the Codex Aleppo is the most accurate copy of the Masoretic text. The codex was vocalised by Aaron ben Asher, who also made notes on the text. He was the last and most famous descendant of the Ben Asher family, a family of Masoretic scholars from Tiberias.
Various modern editions of the Hebrew Bible are based on the text of the Aleppo Codex.