National Library of Mongolia

Mongolian National Library (Mongolian: Монгол улсын үндэсний номын сан) located in Ulaanbaatar, is the largest and the oldest surviving library Mongolia. It houses over 3 million books and publications, 1 million of which are rare and valuable books, sutras and manuscripts, including the world's only surviving copies of many ancient Buddhist texts.

More information on the Wikipedia page ; the Library's Facebook page is.