The Septuagint (LXX), the translation of the Hebrew Bible into Koine Greek, may have been produced at Alexandria, Egypt in stages, starting about 250 BCE. The Alexandrian community then included the largest community of Jews, including a group of scholars who prepared the translation.
“The Septuagint derives its name (derived from Latin septuaginta, 70, hence the abbreviation LXX) from a legendary account in the Letter of Aristeas of how seventy-two Jewish scholars (six scribes from each of the twelve tribes) were asked by the Egyptian pharaoh Ptolemy II Philadelphus in the 3rd century BC to translate the Torah for inclusion in the Library of Alexandria. In a later version of that legend narrated by Philo of Alexandria, although the translators were kept in separate chambers, they all produced identical versions of the text in seventy-two days. Although this story is widely viewed as implausible today, it underlines the fact that some ancient Jews wished to present the translation as authoritative. A version of this legend is found in the Talmud, which identifies 15 specific unusual translations made by the scholars. Only 2 of these translations are found in the extant LXX.”
“The oldest witnesses to the LXX include 2nd century BC fragments of Leviticus and Deuteronomy (Rahlfs nos. 801, 819, and 957), and 1st century BC fragments of Genesis, Exodus,Levitcus, Numbers, Deuteronomy, and the Minor Prophets (Rahlfs nos. 802, 803, 805, 848, 942, and 943). Relatively complete manuscripts of the LXX include the Codex Vaticanus and the Codex Sinaiticus of the 4th century AD/CE and the Codex Alexandrinus of the 5th century. These are indeed the oldest surviving nearly-complete manuscripts of the Old Testament in any language; the oldest extant complete Hebrew texts date from around 1000” (Wikipedia article on Septuagint, accessed 11-29-2008).