#2 – The Voynich Manuscript
For over 100 years, a document known as the Voynich Manuscript has been a big mystery for many experts trying to decode it. It is believed that it originates from the Middle Ages, but is written using an unknown alphabet system. It is thought that it belonged to an alchemist who encrypted his work, so that no one would find out his research. It contains various sketches of plants and astronomical figures. The manuscript has been studied by countless people ever since the 16th century, but not a single page has been decoded so far.