West End of London the Square Mile, is the main business and financial district in London, the West End is the main commercial and entertainment centre of the city. It is the largest central business district in the United Kingdom, comparable to Midtown Manhattan in New York City, Causeway Bay in Hong Kong, Shibuya in Tokyo, or the 8th arrondissement in Paris. It is one of the most expensive locations in the world in which to rent office space. Medieval London comprised two adjacent cities - the City of London (cathedral: St. Paul's) to the east, and the City of Westminster (cathedral: Westminster Abbey)
City of London known as 'Barts'. Founded in 1123, it is located at Smithfield, and is undergoing a long-awaited regeneration after doubts as to its continuing use during the 1990s. The City is the third largest UK patron of the arts. It oversees the Barbican Centre and subsidises several important performing arts companies. The London Port Health Authority, which is the responsibility of the Corporation, is responsible for all port health functions on the tidal part of the Thames, including various seaports and London City Airport. The Corporation oversees the running of the Bridge House Trust, which maintains London Bridge, Blackfriars Bridge, Southwark