The City of Colchester is a local government district with city status in Essex, England, named after its main settlement, Colchester. The district also includes the towns of West Mersea and Wivenhoe and the surrounding rural areas stretching from Dedham Vale on the Suffolk border in the north to Mersea Island in the Colne Estuary in the south. The neighbouring districts are Maldon, Braintree, Babergh, and Tendring. Colchester stands on the site of Camulodunum, which had been an important stronghold of the Trinovantes and Catuvellauni tribes in the Iron Age prior to the Roman conquest of Britain in 43 AD. The Romans subsequently developed Camulodunum into the first capital of their province of Britannia. They later moved their capital to Londinium (London). Following the end of Roman rule in Britain in the early 5th century, the area was settled by Anglo-Saxons, and the town on the site of Camulodunum became known as Colchester. Colchester was an ancient borough with urban forms of local government from Saxon times. Burgesses were already established by the time of the Domesday survey of 1086. The earliest known borough charter dates from 1189, but that charter appears to confirm pre-existing borough rights rather than being the foundation of a new borough. The borough was reformed in 1836 to become a municipal borough. The current district was formed on 1 April 1974, under the Local Government Act 1972, covering four former districts which were abolished at the same time: Colchester Municipal Borough Lexden and Winstree Rural Districts West Mersea Urban District Wivenhoe Urban District The new district was named Colchester after its largest settlement. The new district was awarded borough status from its creation, allowing the chair of the council to take the title of mayor, continuing Colchester's series of mayors. As part of the Platinum Jubilee of Elizabeth II celebrations in 2022, the borough of Colchester was granted city status, confirmed by Letters Patent dated 5 September 2022, allowing the council to change its name to "Colchester City Council".