When was the Torah discovered?

A:The book found, or supposedly found, in the Temple during the reign of King Josiah was the 'Book of Law', believed to have been the Book of Deuteronomy. Scholars say that the relatively modern Hebrew language in the book, along with its similarity of style to other books written during the reign of Josiah (Joshua, Judges, 1 Samuel, 2 Samuel, 1 Kings and 2 Kings), indicate that this book was also written during this time and only placed in the Temple in order to be 'found' there. This allowed Josiah to claim antiquity for the book when reading it to the people of Jerusalem.

The Book of Genesis is substantially based on material written down between the ninth and eighth centuries BCE, with significant additions during the sixth century BCE.

Genesis and the books of the Deuteronomist (Deuteronomy, Joshua, Judges, 1 Samuel, 2 Samuel, 1 Kings and 2 Kings) were redacted, or edited, into their final forms, during post-exilic times.