The Leningrad Codex is one of the oldest complete manuscripts of the Hebrew Bible, dating back to the early 11th century. It is written in Hebrew and serves as a crucial source for biblical studies, providing insights into the text's transmission and preservation over centuries. The codex is housed in the National Library of Russia in Saint Petersburg. This manuscript is significant because it represents the Masoretic Text, which is the authoritative Hebrew text of the Jewish Bible. The Leningrad Codex has been used as a primary reference for many modern translations and is essential for understanding the history of the biblical text.