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
New York City Eastern Europe. The metropolitan area is also home to 20% of the nation's Indian Americans and at least 20 Little India enclaves, and 15% of all Korean Americans and four Koreatowns; the largest Asian Indian population in the Western Hemisphere; the largest Russian American, Italian American, and African American populations; the largest Dominican American, Puerto Rican American, and South American and second-largest overall Hispanic population in the United States, numbering 4.8 million; and includes multiple established Chinatowns within New York City alone. Ecuador, Colombia, Guyana, Peru, and Brazil were the top source countries from South America for legal immigrants to