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
History of the Jews in Europe History of the Jews in Europe Jews, originally Judaean Israelite tribes from the Levant in Western Asia, migrated to Europe just before the rise of the Roman Empire. A notable early event in the history of the Jews in the Roman Empire was Pompey's conquest of the East beginning in 63 BCE although Alexandrian Jews had migrated to Rome before this event. The pre-World War II Jewish population of Europe is estimated to have been close to 9 million. Around 6 million Jews were killed during the Holocaust, which was followed by the emigration of much of the surviving population.