Manchester (/ˈmæntʃɪstər, -tʃɛs-/)[4][5] is the most-populous city and metropolitan borough in North West England and Greater Manchester, England. The city has the country's fifth-largest population at 547,627 (as of 2018)[6] and lies within the United Kingdom's second-most populous urban area, with a population of 2.7 million,[7] third most-populous county, at around 2.8 million.[8] It is fringed by the Cheshire Plain to the south, the Pennines to the north and east, and an arc of towns with which it forms a continuous conurbation.[9] The local authority for the city is Manchester City Council. Manchester is commonly referred to as the "second city of the United Kingdom",[10][11][12][13] although whether Manchester or Birmingham is Britain's second city is disputable.[14][15]

The recorded history of Manchester began with the civilian settlement associated with the Roman fort of Mamucium or Mancunium, which was established in about AD 79 on a sandstone bluff near the confluence of the rivers Medlock and Irwell. Although historically and traditionally a part of Lancashire, areas of Cheshire south of the River Mersey were incorporated into Manchester in the 20th century. The first to be included, Wythenshawe, was added to the city in 1931. Throughout the Middle Ages Manchester remained a manorial township, but began to expand "at an astonishing rate" around the turn of the 19th century. Manchester's unplanned urbanisation was brought on by a boom in textile manufacture during the Industrial Revolution,[16] and resulted in it becoming the world's first industrialised city.

[17] Manchester achieved city status in 1853. The Manchester Ship Canal opened in 1894, creating the Port of Manchester and directly linking the city to the Irish Sea, 36 miles (58 km) to the west. Its fortune declined after the Second World War, owing to deindustrialisation, but the IRA bombing in 1996 led to extensive investment and regeneration.[18] Following successful redevelopment after the IRA bombing, Manchester was the host city for the 2002 Commonwealth Games.
The city is notable for its architecture, culture, musical exports, media links, scientific and engineering output, social impact, sports clubs and transport connections. Manchester Liverpool Road railway station was the world's first inter-city passenger railway station. At the University of Manchester, Ernest Rutherford first split the atom in 1917, Frederic C. Williams, Tom Kilburn and Geoff Tootill developed the world's first stored-program computer in 1948, and Andre Geim and Konstantin Novoselov isolated the first graphene in 2004.

The Brigantes were the major Celtic tribe in what is now known as Northern England; they had a stronghold in the locality at a sandstone outcrop on which Manchester Cathedral now stands, opposite the bank of the River Irwell.[22] Their territory extended across the fertile lowland of what is now Salford and Stretford. Following the Roman conquest of Britain in the 1st century, General Agricola ordered the construction of a fort named Mamucium in the year 79 to ensure that Roman interests in Deva Victrix (Chester) and Eboracum (York) were protected from the Brigantes.[22] Central Manchester has been permanently settled since this time.[23] A stabilised fragment of foundations of the final version of the Roman fort is visible in Castlefield. The Roman habitation of Manchester probably ended around the 3rd century; its civilian settlement appears to have been abandoned by the mid-3rd century, although the fort may have supported a small garrison until the late 3rd or early 4th century.[24] After the Roman withdrawal and Saxon conquest, the focus of settlement shifted to the confluence of the Irwell and Irk sometime before the arrival of the Normans after 1066.[25] Much of the wider area was laid waste in the subsequent Harrying of the North.[26][27]
Cotton mills in Ancoats about 1820

The Peterloo massacre of 1819 resulted in 15 deaths and several hundred injured
In the Domesday Book of 1086, Manchester is recorded as within the hundred of Salford and held as tenant in chief by a Norman named Roger of Poitou,[28] later being held by the family of Grelley, lord of the manor and residents of Manchester Castle until 1215 before a Manor House was built.[29] By 1421 Thomas de la Warre founded and constructed a collegiate church for the parish, now Manchester Cathedral; the domestic premises of the college house Chetham's School of Music and Chetham's Library.[25][30] The library, which opened in 1653 and is still open to the public today, is the oldest free public reference library in the United Kingdom.[31]
Manchester is mentioned as having a market in 1282.[32] Around the 14th century, Manchester received an influx of Flemish weavers, sometimes credited as the foundation of the region's textile industry.[33] Manchester became an important centre for the manufacture and trade of woollens and linen, and by about 1540, had expanded to become, in John Leland's words, "The fairest, best builded, quickest, and most populous town of all Lancashire."[25] The cathedral and Chetham's buildings are the only significant survivors of Leland's Manchester.[26]

During the English Civil War Manchester strongly favoured the Parliamentary interest. Although not long-lasting, Cromwell granted it the right to elect its own MP. Charles Worsley, who sat for the city for only a year, was later appointed Major General for Lancashire, Cheshire and Staffordshire during the Rule of the Major Generals. He was a diligent puritan, turning out ale houses and banning the celebration of Christmas; he died in 1656.[34]
Significant quantities of cotton began to be used after about 1600, firstly in linen/cotton fustians, but by around 1750 pure cotton fabrics were being produced and cotton had overtaken wool in importance.[25] The Irwell and Mersey were made navigable by 1736, opening a route from Manchester to the sea docks on the Mersey. The Bridgewater Canal, Britain's first wholly artificial waterway, was opened in 1761, bringing coal from mines at Worsley to central Manchester. The canal was extended to the Mersey at Runcorn by 1776. The combination of competition and improved efficiency halved the cost of coal and halved the transport cost of raw cotton.[25][30] Manchester became the dominant marketplace for textiles produced in the surrounding towns.[25] A commodities exchange, opened in 1729,[26] and numerous large warehouses, aided commerce. In 1780, Richard Arkwright began construction of Manchester's first cotton mill.[26][30] In the early 1800s, John Dalton formulated his atomic theory in Manchester.
Industrial Revolution:
Manchester was one of the centres of textile manufacture during the Industrial Revolution. The great majority of cotton spinning took place in the towns of south Lancashire and north Cheshire, and Manchester was for a time the most productive centre of cotton processing.[35]

Manchester became known as the world's largest marketplace for cotton goods[25][36] and was dubbed "Cottonopolis" and "Warehouse City" during the Victorian era.[35] In Australia, New Zealand and South Africa, the term "manchester" is still used for household linen: sheets, pillow cases, towels, etc.[37] The industrial revolution brought about huge change in Manchester and was key to the increase in Manchester's population.
Manchester began expanding "at an astonishing rate" around the turn of the 19th century as people flocked to the city for work from Scotland, Wales, Ireland and other areas of England as part of a process of unplanned urbanisation brought on by the Industrial Revolution.[38][39][40] It developed a wide range of industries, so that by 1835 "Manchester was without challenge the first and greatest industrial city in the world."[36] Engineering firms initially made machines for the cotton trade, but diversified into general manufacture. Similarly, the chemical industry started by producing bleaches and dyes, but expanded into other areas. Commerce was supported by financial service industries such as banking and insurance.
View from Kersal Moor towards Manchester by Sebastian Pether, circa 1820, then still a rural landscape. Note the River Irwell in both paintings.

Manchester from Kersal Moor, by William Wyld in 1857, a view now dominated by chimney stacks as a consequence of the Industrial Revolution.
Trade, and feeding the growing population, required a large transport and distribution infrastructure: the canal system was extended, and Manchester became one end of the world's first intercity passenger railway—the Liverpool and Manchester Railway. Competition between the various forms of transport kept costs down.[25] In 1878 the GPO (the forerunner of British Telecom) provided its first telephones to a firm in Manchester.[41]
The Manchester Ship Canal was built between 1888 and 1894, in some sections by canalisation of the Rivers Irwell and Mersey, running 36 miles (58 km)[42] from Salford to Eastham Locks on the tidal Mersey. This enabled oceangoing ships to sail right into the Port of Manchester. On the canal's banks, just outside the borough, the world's first industrial estate was created at Trafford Park.[25] Large quantities of machinery, including cotton processing plant, were exported around the world.
A centre of capitalism, Manchester was once the scene of bread and labour riots, as well as calls for greater political recognition by the city's working and non-titled classes. One such gathering ended with the Peterloo massacre of 16 August 1819. The economic school of Manchester Capitalism developed there, and Manchester was the centre of the Anti-Corn Law League from 1838 onward.[43]