Hulagu Khan

The House of Wisdom contained so many books that the Tigris River turned black from the ink when all of them were destroyed

  Nov 23, 2016 House of Wisdom Back in the 9th century AD, the House of Wisdom was established in Baghdad. It contained manuscripts on mathematics, astronomy, science, medicine, and philosophy from Persia, India, and Greece. There were also astronomical observatories, laboratories for chemistry and alchemy, and a center for studying […]