Central City, Kentucky bituminous coal underlying the bedrock. Central City has a number of old underground coal mine shafts that still crisscross the city. Most of these old shafts date back to the early 1900s. The majority of terrain around the city limits is reclaimed land where surface mining has taken place. As of the census of 2000, there were 5,893 people, 2,065 households, and 1,410 families residing in the city. The population density was 1,126.2 people per square mile (435.0/km). There were 2,313 housing units at an average density of 442.0 per square mile (170.8/km). The racial makeup of the city was
City of London Bridge, Tower Bridge and the Millennium Bridge. The City's flag flies over Tower Bridge, although neither footing is in the City. The size of the City was constrained by a defensive perimeter wall, known as London Wall, which was built by the Romans in the late 2nd century to protect their strategic port city. However the boundaries of the City of London no longer coincide with the old city wall, as the City expanded its jurisdiction slightly over time. During the medieval era, the City's jurisdiction expanded westwards, crossing the historic western border of the original settlement—the River Fleet—along Fleet