Archeologists have discovered a 12th cave that once held Dead Sea scrolls, ancient Biblical and other texts dating from 400 B.C. to 100 A.D.
This cave, though, had been looted and contains no scrolls. (One wonders, where are they?) But it does preserve some artifacts from the ancient Jews–whether members of the Essene sect or, as some scholars now think, priests– who kept the library.
Photo of Cave 4, where 90% of the scrolls were found, by Effi Schweizer – Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3089552