The House of Wisdom was a centre of learning founded in Baghdad at the beginning of the 9th century. As well as housing thousands of books, the House of Wisdom encouraged research and the translation of mathematical, scientific, and philosophical texts from the ancient Greece. Similar establishments were founded in many islamic cities in a time which was described as the "Islamic Golden Age".
Another prominent scholar at the House of Wisdom was the polymath Abu Yusuf Ya'qub ibn 'Ishaq al-Kindi, who in the mid-9th century wrote a large number of treatises on various scientific subjects, ranging from mathematics, astronomy and optics to medicine and geography.
- There are four-hundred thousand books in the House of Wisdom altogether.