The Septuagint. (LXX)
A translation of the Hebrew Old Testament into the Greek language made in Alexandria, Egypt, the residence of many Greek speaking Jews. According to tradition, 70 skilled Jewish linguists travelled to Egypt and made the translation at the invitation of king Ptolemy Philadelphus (205-247 BC).
Why did this translation occur?
Greek was used in most of the world at that time and this translation (The Septuagint) was used regularly in the time of Christ. Many New Testament writers took their Old Testament quotations from the Septuagint. The translation is sometimes abbreviated LXX, the Roman numeral for seventy implying the number of translators used in producing the translation.