Liverpool is a city and metropolitan borough of Merseyside, England, along the eastern side of the Mersey Estuary. It was founded as a borough in 1207 and was granted city status in 1880. Liverpool is the fourth largest city in the United Kingdom (third largest in England) and has a population of 435,500, and lies at the centre of the wider Liverpool Urban Area, which has a population of 816,216.

Historically a part of Lancashire, the urbanisation and expansion of Liverpool were both largely brought about by the city's status as a major port. By the 18th century, trade from the West Indies, Ireland and mainland Europe coupled with close links with the Atlantic Slave Trade furthered the economic expansion of Liverpool. By the early 19th century, 40% of the world's trade passed through Liverpool's docks, contributing to Liverpool's rise as a major city.