when did london's population reach 1 million
History of London During the 19th century, London was transformed into the world's largest city and capital of the British Empire. Its population expanded from 1 million in 1800 to 6.7 million a century later. During this period, London became a global political, financial, and trading capital. In this position, it was largely unrivalled until the latter part of the century, when Paris and New York began to threaten its dominance.
Demography of the Roman Empire At its peak, after the Antonine Plague of the 160s CE, it had a population of about 60â€“70 million and a population density of about 16 persons per square kilometer. In contrast to the European societies of the classical and medieval periods, Rome had unusually high urbanization rates. During the 2nd century CE, the city of Rome had more than one million inhabitants. No Western city would have as many again until the 19th century.