What was adopted as the old tetament by Christianity?

Christianity adopted the Septuagint, a Greek translation of the Hebrew Scriptures, as its Old Testament. This collection includes the books of the Hebrew Bible, along with additional texts known as the Deuterocanonical books, which are accepted by the Catholic and Orthodox traditions but not by most Protestant denominations. The Septuagint played a significant role in the early Christian church, influencing theology and scripture references in the New Testament. Different Christian traditions may have varying versions of the Old Testament, but the Septuagint remains foundational for many.