List of Hebrew Bible manuscripts
A Hebrew Bible manuscript is a handwritten copy of a portion of the text of the Hebrew Bible (Tanakh) made on papyrus, parchment, or paper, and written in the Hebrew language. (Some of the Biblical text and notations may be in Aramaic.) The oldest manuscripts were written in a form of scroll, the medieval manuscripts usually were written in a form of codex. The late manuscripts written after the 9th century use the Masoretic Text. The important manuscripts are associated with Aaron ben Asher (especially Codex Leningradensis). The earliest sources (whether oral or written) of  the Hebrew Bible disappeared over time, because of the fragility of media, wars, (especially the destruction of the First and Second Temples), and other intentional destructions. As a result, the lapse of time between the original manuscripts and their surviving copies is much longer than in the case of the New Testament manuscripts. The first list of the Old Testament manuscripts in Hebrew, made by Benjamin Kennicott (1718–1783) and published by Oxford in 2 volumes in 1776 and 1780, listed 615 manuscripts from libraries in England and on the Continent. Giovanni Battista de Rossi (1822–1894) published a list of 731  manuscripts. The main manuscript discoveries in modern times are those of the Cairo Geniza (c. 1890) and the Dead Sea Scrolls (1947). In the old synagogue in Cairo were discovered 260,000 Hebrew manuscripts, 10,000 of which are biblical manuscripts. There are more than 200 biblical manuscripts among the Dead Sea Scrolls, some of them were written in the Paleo-Hebrew alphabet. They were written before the year 70 CE. 14 scroll manuscripts were discovered in Masada in 1963–1965. The largest organized collection of Hebrew Old Testament manuscripts in the world is housed in the Russian National Library ("Second Firkovitch Collection