Many libraries have Special Collections, comprising of items that are usually of cultural or historical importance, that need extra conservation or preservation care to maintain them. These collections are normally stored in a climate controlled environment, for example.  Click the link for a cool article from The Library as Incubator Project, an interview with the Special Collections Librarian at the Thomas J. Watson Library, which is part of the Metropolitan Museum of Art.

The link takes you to The Library As Incubator Project.