largest city by the year 1200?

The largest city by the year 1200 was Baghdad, the capital of the Abbasid Caliphate. It was estimated to have had a population of over one million people at its peak, making it the largest city in the world at that time. Baghdad was a major center of learning, culture, and commerce, and was home to many famous scholars, artists, and poets. It was also the site of many important historical events, including the Mongol invasion in 1258.