18 of the World's Most Striking Libraries, Illustrated

The building has no windows, in order to keep direct sunlight from harming the rare books, but the very thin marble walls let low light in during the day. At night the building glows from the interior lighting within. The collection inside includes a Gutenberg Bible from 1454 (one of only 48 known copies) and the mysterious medieval Voynich manuscript, which is filled with indecipherable text, strange diagrams, and illustrations of bizarre plants.