Question

how many library in nalanda University.??.

Answer 1

Nalanda university’s library was one of the biggest library of the world at that time. It had large collections of books, manuscripts. It was called as Dharma Gunj or Dharmagañj . Library was divided into 3 buildings- Ratnasagara, Ratnadadhi and Ratnaranjaka. Among these buildings, Ratnasagara was nine storied building. 

library is only one but divided in 3 parts.

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Answer 2

Traditional Tibetan sources mention the existence of a great library at Nalanda named Dharmaganja (Piety Mart) which comprised three large multi-storeyed buildings, the Ratnasagara (Ocean of Jewels), the Ratnodadhi (Sea of Jewels), and the Ratnaranjaka (Jewel-adorned).