Southwark (pronounced /ˈsʌðɚk/ sudh-ərk) is a district of south London, England, UK, and the administrative headquarters of the London Borough of Southwark. Situated 1.5 miles (2.4 km) east of Charing Cross, it forms one of the oldest parts of London and fronts the River Thames to the north. It historically formed an ancient borough in the county of Surrey, made up of a number of parishes, which increasingly came under the influence and jurisdiction of the City of London. As an inner district of London, Southwark experienced rapid depopulation during the late 19th and early 20th centuries. It is now at an advanced stage of regeneration and is the location of the City Hall offices of the Greater London Authority.