The Codex Vaticanus (The Vatican, Bibl. Vat., Vat. gr. 1209; Gregory-Aland no. B or 03) is one of the oldest extant manuscripts of the Bible. It is slightly older than Codex Sinaiticus, both of which were probably transcribed in the 4th century. It is written in Greek, on vellum, with uncial letters.
Vaticanus originally contained a complete copy of the Septuagint ("LXX") except for 1-4 Maccabees and the Prayer of Manasseh. Genesis 1:1 - 46:28a (31 leaves) and Psalm 105:27 - 137:6b (10 leaves) are lost and have been filled by a recent hand. 2 Kings 2:5-7, 10-13 are also lost due to a tear in one of the pages. The order of the Old Testament books is as follows: Genesis to 2 Chronicles as normal, 1 and 2 Esdras, the Psalms, Proverbs, Ecclesiastes, Song of Songs, Job, Wisdom, Ecclesiasticus, Esther, Judith, Tobit, the minor prophets from Hosea to Malachi, Isaiah, Jeremiah, Baruch, Lamentations and the Epistle of Jeremiah, Ezekiel and Daniel.