The Voynich Manuscript is a mysterious volume of text and illustrations written some time in the 15th or 16 centuries, so named after Wilfrid M. Voynich who acquired the book in 1912. It has been classified as “magical” and “scientific” but is written in an undeciphered text and is said to be the most “mysterious manuscript in the world.”
Ancient Chinese astronomical observations contained in the wooden chronicle known as the "Bamboo Annals" contain many details of comets, fireballs, and especially planetary conjunctions, the accuracy of which can now be verified using computer technology
Taschenkalender - pocket calendar from about 1400 CE This pocket calendar from about 1400 was intended to be used daily by farmers and therefore could be folded. In this form it had a size of 7,5 x 6,5 cm. Besides the usual labour of the month and the respective sign of the zodiac it additionally shows a schematic representation of the average length of the day.