event · E0301
Aleppo Codex כתר ארם צובא
The most authoritative codex of the Masoretic text: its consonantal text written by the scribe Shlomo ben Buya'a in Tveria around 930 CE, its vocalization, cantillation, and Masorah added by Aharon ben Moshe ben Asher, last of the great Masoretic dynasty — the very codex the Rambam examined and endorsed as the standard for hilchot sefer Torah. Guarded for centuries by the Aleppo community, it was damaged in the 1947 Aleppo riots; roughly 294 of its original ~487 leaves survive, with almost the entire Torah among the lost. Smuggled to Israel in 1958 and entrusted to President Ben-Zvi, it is displayed in the lower level of the Shrine of the Book at the Israel Museum.

I. Who
- Hebrew
- כתר ארם צובא
- Also known as
- Keter Aram Tzova, The Crown of Aleppo
- Era
- geonim
II. When
- Traditional
- c. 4690 AM — written in Tveria around 930 CE
- Academic
- c. 920–930 CE
- Date range
- c. 920–930 CE (Tiberias)
- Duration
- ≈10 years
- Precision
- approximate
III. Where
- Places
- Tveria
Why it matters
If the Dead Sea Scrolls show the biblical text a thousand years before the Masoretes, this book is the Masoretes' masterpiece itself — the single most exact copy of the Tanakh ever made, produced in Tveria by the last and greatest of the Ben Asher dynasty. When the Rambam needed a standard for writing a sefer Torah, he chose this codex by name, "for all relied on it." Its later story is a wound: guarded in Aleppo for five centuries, torn in the riots of 1947, and returned to Israel missing almost the whole Torah. What survives sits a few steps from the Qumran scrolls — the two ends of the chain of transmission in one building.
V. How do we know
| Claim | Evidence | Confidence | Sources |
|---|---|---|---|
| The codex was produced in Tveria around 920–930 CE — consonantal text by Shlomo ben Buya'a, vocalization and Masorah by Aharon ben Moshe ben Asher — and is regarded as the most accurate surviving exemplar of the Tiberian Masoretic text. | external tradition | ★★★★★ | |
| The Rambam, writing in Egypt, fixed his hilchot sefer Torah by "the codex known in Egypt… which was in Jerusalem, containing the whole Tanakh, on which all relied, because Ben Asher corrected it and worked over it in detail for many years" — identified by scholarship (Penkower and others) with the Aleppo Codex, which reached Aleppo after Egypt.
The Rambam's own words are certain; the identification of his exemplar with the Aleppo Codex is the accepted scholarly conclusion, not an explicit statement in the codex.
|
rabbinic tradition | ★★★★☆ | |
| About 294 of the original ~487 leaves survive; roughly 40% of the codex, including almost the entire Torah, has been missing since the December 1947 Aleppo riots. The codex was smuggled to Israel in 1958 and entrusted to President Yitzchak Ben-Zvi; it is stewarded by the Ben-Zvi Institute with a rabbinic trusteeship of the Aleppo community, displayed in the lower level of the Shrine of the Book at the Israel Museum, and was inscribed in UNESCO's Memory of the World register in 2015. | external | ★★★★★ |