Most Expensive Book In The World
$ 30.8 million in 1994, the auction Christies[($ 44,6 million in current prices *)
Notebook entries by Leonardo da Vinci, made during his life in Milan in 1506-1510, respectively. The manuscript consists of 18 sheets of paper covered on both sides and folded in such a way that together they formed a 72-page book. Leonardo notes written in a special way, his own "...mirror" type - they can be read only by means of a mirror. Entries are devoted to various events, mused about the nature of which Leonardo: why the moon is shining, why and how the water flows in rivers, where are the fossils of which are minerals and so on. Notebook also contains a large number of mathematical calculations, diagrams and drawings. "Leicester" code was named after the Earl of Leicester, who bought the manuscript in 1717. In 1980, the book's heirs Lester bought the famous industrialist, collector and friend of the Soviet Armand Hammer, after which he served for a short period called the "Code Hammer» (Codex Hammer). After his death in 1994 the code was put up for auction, in which was acquired by Microsoft founder Bill Gates and he regularly exhibited in museums.