Beinecke Rare Book and Manuscript Library
To emphasize the beauty of these rare books, they were set up to be the centerpiece of the building. All the books were placed around the core like a large display case. The exterior skin is composed of thin marble panels that allow light to show through but not damage the books. [Wikimedia]
It is the largest building in the world dedicated to the containment and preservation of rare books, manuscripts, and documents.[ArchDaily]