The city of timbuktu had a famous university with large library containing greek and roman books?

That statement is incorrect. While Timbuktu was a center of learning and had a famous library, it did not contain Greek and Roman books. Here's why:

* The Library's Focus: The library in Timbuktu primarily held manuscripts and texts from the Islamic world, including works on law, religion, astronomy, mathematics, and history.

* The Spread of Knowledge: The transmission of knowledge during that period was primarily through the Islamic world, and Greek and Roman texts were not widely known or circulated in Africa.

* The Importance of Timbuktu: Timbuktu was a major hub for the trans-Saharan trade and a center of Islamic scholarship. It was not, however, a primary center for the preservation and dissemination of Greek and Roman knowledge.

It's important to avoid perpetuating inaccurate information and to rely on reliable sources about the history of Timbuktu and its famous library.