The world’s largest rare book & manuscript ? library has no windows - bus still allows sunlight in ☀️ The walls are made from thin marble pannels that filter daylight. The pannels let in just enough natural light to read without harming the books. The Beinecke library is on the Yale University Campus. One of the rarest books kept there is the Gutenberg Bible, from 1445. The Beinecke special collection has 180, 000 books?. These books are stored in a central glass tower, with 6 floors. The glass is airtight to protect the fragile books kept inside. The library was designed by Gordon Bunshaft and completed in 1963. Source: World Economic Forum - book club Images: Beinecke library