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
Religion in Europe over 4% in Switzerland and Austria, between 3 and 4% in Greece The Jews were dispersed within the Roman Empire from the 2nd century. At one time Judaism was practiced widely throughout the European continent; throughout the Middle Ages, Jews were accused of ritual murder and faced pogroms and legal discrimination. The Holocaust perpetrated by Nazi Germany decimated Jewish population, and today, France is home to the largest Jewish community in Europe with 1% of the total population (between 483,000 and 500,000 Jews). Other European countries with notable Jewish populations include the United Kingdom (291,000 Jews), Germany (119,000), and Russia