The Voynich_manuscript is very interesting and mysterious.
https://www.britannica.com/topic/Voynich-manuscript
The World’s Most Mysterious Book That No One Can Decode • Mystery Files https://www.youtube.com/watch?v=oUUwmB6Fv2A
https://www.newyorker.com/books/page-turner/the-unread-the-mystery-of-the-voynich-manuscript
https://undark.org/2020/02/12/decoding-bizarre-voynich-manuscript/
Ancient Manuscripts That Should Never Have Been Opened https://www.youtube.com/watch?v=AajoxuTm9kc
