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 membership rolls, mainly among Indian immigrants in Belgium and the United Kingdom, as well as several converts from western and northern Europe. Sikhism has nearly 1 million adherents in Europe. Most of the community live in United Kingdom (750,000) and Italy (70,000). Around 10,000 in Belgium and France. The Netherlands and Germany have a Sikh population of 12,000. All other countries have 5,000 or fewer Sikhs such as Greece. Other religions represented in Europe include: Religion in Europe Religion in Europe has been a major influence on today's society, art, culture, philosophy and law. The largest religion in Europe is