Central City/Black Hawk Historic District and funds as a result. Central City/Black Hawk Historic District The Central City/Black Hawk Historic District is a National Historic Landmark District that encompasses Central City and Black Hawk, Colorado. They are adjacent former gold mining camps in the Front Range of the Rocky Mountains in Gilpin County, Colorado, United States. For a time, the area was known as the Richest Square Mile on Earth. The district was designated a National Historic Landmark on July 4, 1961. On May 5, 1859, John H. Gregory discovered a rich deposit of gold in hard rock, the first such discovery in the Rocky
Flag of the City of London it is hanging down (see below). This flag does not represent Greater London (which does not have its own flag, aside from the banner of the arms of the former Greater London Council), only the historical City of London which covers approximately . All references in this article relate to that city, not Greater London, unless specified. The flag is a banner of arms, derived from the city's coat of arms with the sword symbolising the sword that beheaded Saint Paul who is the patron saint of the city. Saint Paul has featured as a symbol of the city since