Greater London is often referred to as "the City" or "the Square Mile" and it forms the main financial district. Archaically, the urbanised area of London was known as the Metropolis. In common usage, the terms "London" and "Greater London" are usually used interchangeably. Greater London is officially divided for some purposes, with varying definitions, into Inner London and Outer London. For some strategic planning purposes it is divided into five sub-regions. Greater London is under the strategic local governance of the Greater London Authority (GLA). It consists of an elected assembly, the London Assembly, and an executive head, the Mayor of
Hartford City Courthouse Square Historic District which is the top rating. The properties are assessed for their historic significance, architectural merit, environment, and integrity. All seven of the outstanding properties listed here are contributing properties to the Hartford City Courthouse Square Historic District, and two have already been listed in the National Register of Historic Places. The Blackford County Courthouse was added to the National Register of Historic Places on August 11, 1980. Like most of the other buildings in the Hartford City Courthouse Square Historic District, the Blackford County Courthouse was built during the Indiana Gas Boom. The county's original courthouse was condemned in 1893,