This article lists the largest human settlements in the world (by population) over time, as estimated by historians, from 7000 BC when the largest populated place in the world was a proto-city in the Ancient Near East with a population of about 1,000–2,000 people, to the year 2000 when the largest urban area was Tokyo with 26 million. Alexandria, Rome, or Baghdad may have been the first city to have 1,000,000 people, as early as 100 BC or as late as 925 AD. They were later surpassed by Constantinople, Chang'an, Kaifeng, Hangzhou, Jinling, Beijing, Edo, London (the first city to reach 2 million), and New York (the first to top 10 million), among others, before Tokyo took the crown in the mid-20th century. As of 2020, the Greater Tokyo Area is the most populous metropolitan area in the world