In the ancient Greek mythology of 700 BC there was a myth about "Pandora's Box" inside which contained misfortunes and diseases, and at the bottom was the hope for a miracle that will change the world for the better.
However, there is one strange story that refers us back to the XIII century. And this story tells of a woman who accidentally in one of her expeditions found the "Mysterious Box" which she secretly took to herself and did not tell anyone about it. And after the expeditions were over, she locked herself in her house and had no contact with anyone. After a month people became concerned and decided to visit her. But she wasn't at home, it was as if she had disappeared, leaving all her belongings and findings behind. Except for one thing she never told anyone about...
And after that story, terrible things began to happen. Plagues (and many other deadly diseases), wars, disasters and so on.
Is this strange story true? No one knows...