"Codex Gigas, otherwise known as ‘the Devil’s Bible’ is the largest and probably one of the strangest manuscripts in the world. It is so large that it is said to have taken more than 160 animal skins to make it and takes at least two people to lift it. It measures approximately 1 metre in length." Source: Ancient Origins.
"According to legend, the medieval manuscript was made out of a pact with the ‘devil’, which is why it is sometimes referred to as the Devil’s Bible. It was written in Latin during the 13th century AD, and although the origin of the manuscript is unknown, a note in the manuscript states that it was pawned in the [Cistercian] monastery at Sedlec in 1295."
Note: Sedlec is the home of the bizarre Sedlec Ossuary, a Roman Catholic chapel which contains "the skeletons of between 40,000 and 70,000 people, whose bones have in many cases been artistically arranged to form decorations and furnishings for the chapel," according to Wikipedia.