Europe of population are Saint Petersburg, Madrid, Berlin and Rome, each having over 3 million residents. When considering the commuter belts or metropolitan areas, within the EU (for which comparable data is available) London covers the largest population, followed in order by Paris, Madrid, Barcelona, Berlin, the Ruhr area, Rome, Milan, Athens and Warsaw. "Europe" as a cultural concept is substantially derived from the shared heritage of the Roman Empire and its culture. The boundaries of Europe were historically understood as those of Christendom (or more specifically Latin Christendom), as established or defended throughout the medieval and early modern history of
Largest cities in Japan by population by decade Meiji Mergers" cut the number of municipalities in Japan by more than three quarters, while dramatically increasing the size of many cities as they absorbed their surrounding towns and villages. Source data is from the 1891 Imperial Japanese Registered Household Report (日本帝国民籍戸口表). Source data is from the 1898 Imperial Japanese Population Statistics (日本帝国人口統計). Source data is from the 1908 Imperial Japanese Population Statistics (日本帝国人口統計). Source data is from the 1920 Census (国勢調査), the first formal census to be taken in Japan. Source data is from the 1930 Census. Source data is from the 1940 Census. Japan emerged from the Second