From the wiki: "The Copiale cipher is an encrypted manuscript consisting of 75,000 handwritten characters filling 105 pages in a bound volume.[1] Undeciphered for more than 260 years, the document was cracked in 2011 with the help of modern computer techniques."
Link: https://en.wikipedia.org/wiki/Copiale_cipher
And, more images, translations, etc: https://cl.lingfil.uu.se/~bea/copiale/
Ancient masonic texts, initiations, rites, etc, for your reading pleasure.