The Codex Cairensis (also: Codex Prophetarum Cairensis, Cairo Codex of the Prophets) is a Hebrew manuscript containing the complete text of the Hebrew Bible Nevi'im (prophets). It has been described as "the oldest dated Hebrew Codex of the Bible which has come down to us".
According to its colophon, it was written complete with punctuation by Moses ben Asher in Tiberias "at the end of the year 827 after the destruction of the second temple" (= 895 CE). It was given as a present to the Karaite community in Jerusalem, and taken as booty by the Crusaders in 1099. Later, it was redeemed and came into the possession of the Karaite community in Cairo. The Codex is now under the custody of the Karaite Jews in Israel, after they left Egypt due to the political situation between the two countries.
Although according to its colophon the codex was written by a member of the Ben Asher family, Lazar Lipschütz and others observed that, within the masoretic tradition, Codex Cairensis seems to be closer to Ben Naphtali than to Ben Asher.
While some scholars consider this to be an argument against its authenticity, Moshe Goshen-Gottstein assumed that Ben Naphtali stuck more faithfully to the system of Moses ben Asher than the latter's own son Aaron ben Moses ben Asher who corrected the Aleppo Codex and added its punctuation.
More recently, further doubts on its authenticity have been cast by radio-carbon dating and other scientific techniques.
Umberto Cassuto relied heavily on this codex when producing his edition of the Masoretic Text, which means that in the prophets his edition is closer to the ben Naphtali tradition than in the Torah or Writings.
The codex itself - all 575 pages, including the 13 carpet pages which are not part of the online version - are kept in a secure room on the floor below the Hebrew Manuscript collection at the Hebrew University in Jerusalem.
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- Paul Kahle, "The Cairo Geniza", 2nd ed 1959, p.91
- The City and the Book I
- The Hebrew University Bible Project: Ezekiel, p.xli, note 116: "It was recently proven conclusively that the scribe and the naqdan (vocaliser) of the Cairo Prophets codex cannot be identified as Moshe Ben-Asher, and cannot be dated to 895 but rather to the 11th century CE. Cf. M. Beit-Arié et al., Codices Hebraicis litteris exarati quo tempore scripti fuerint exhibentes (Monumenta palaeographica medii aevi. Series Hebraica; Paris/Jerusalem: Brepols, 1997) 25-29; D. Lyons, The Cumulative Masora: Text, Form and Transmission (Beer-Sheva: Ben-Gurion University Press, 1999 -7 (Hebrew).
- column by Jerusalem Post columnist and editor J. Zel Lurie 
- Ernst Würthwein, Der Text des Alten Testaments, Stuttgart 1974 (4th edition), ISBN 3-438-06006-X
- The Hebrew University Bible Project: Ezekiel, ed. Shemaryahu Talmon; pub. The Hebrew University Magnes Press, Jerusalem, 2004; ISBN 965-493-186-9
- Israel Yeivin, trans. E. J. Revell: Introduction to the Tiberian Masorah 1980, ISBN 0-89130-373-1