Middlesex (abbreviated Middx) is a former county in southeast England. It was established in antiquity from the territory of the Middle Saxons. Proximate to the United Kingdom capital city of London, the small county became densely populated, leading to problems with its viability. It was subject to a significant loss of territory in 1889 and was abolished on 1 April 1965. The former area of Middlesex now corresponds to much of Greater London and parts of Berkshire, Hertfordshire and Surrey.