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
Chinatowns in Europe re-established since the 2010s. The city hosts the biennial high-level conference "" and also has a major Chinese consulate at "Elbchaussee" 268 in Othmarschen since 1921. Shanghai is a sister city of Hamburg. Thessaloniki, Greece's second largest city, has seen an influx of Chinese primarily from the Yunnan province since 2002. Its Chinatown is located in the western end of the city within its Second District. Most of the residents speak Mandarin and are primarily involved in the city's wholesale trade of goods. The country has had a very small Chinese population since World War II, but most of the