What was the largest city in the west in 1000 AD with 450000 people?

The largest city in the west around 1000 AD, with an estimated population of 450,000, was Córdoba, located in present-day Spain. At that time, Córdoba was a major cultural, economic, and political center of the Islamic world, known for its advanced architecture, libraries, and schools. Its population and prominence were a result of the flourishing Moorish civilization in the Iberian Peninsula.