what is the main part of a city
City The vast majority of cities have a central area containing buildings with special economic, political, and religious significance. Archaeologists refer to this area by the Greek term temenos or if fortified as a citadel.[30] These spaces historically reflect and amplify the city's centrality and importance to its wider sphere of influence.[29] Today cities have a city center or downtown, sometimes coincident with a central business district.
Chicago metropolitan area The Chicago metropolitan area, or Chicagoland, is the metropolitan area that includes the city of Chicago, Illinois, and its suburbs. With an estimated population of 9.4 million people, it is the third largest metropolitan area in the United States.[2]