Birmingham (/ˈbɜːrmɪŋəm/ (listen)[3][4][5] BUR-ming-əm) is a major city and metropolitan borough in the West Midlands, England. It is the second-largest city, second-largest metropolitan area and third-largest urban area in the United Kingdom,[b][6] with roughly 1.2 million inhabitants within the city area, 2.8 million inhabitants within the urban area,[7] and 4.3 million inhabitants within the metropolitan area.[8] The city proper is the most populated English local government district.[9] Birmingham is commonly referred to as the "second city of the United Kingdom".[10][11]

Located in the West Midlands county and region in England, approximately 100 miles (160 km) from Central London, Birmingham, as one of the United Kingdom's major cities, is considered to be the social, cultural, financial, and commercial centre of the Midlands. Distinctively, Birmingham only has small rivers flowing through it, mainly the River Tame and its tributaries River Rea and River Cole – one of the closest main rivers is the Severn, approximately 20 miles (32 km) west of the city centre.

Historically a market town in Warwickshire in the medieval period, Birmingham grew during the 18th century during the Midlands Enlightenment and during the Industrial Revolution, which saw advances in science, technology, and economic development, producing a series of innovations that laid many of the foundations of modern industrial society.[12] By 1791, it was being hailed as "the first manufacturing town in the world".[13] Birmingham's distinctive economic profile, with thousands of small workshops practising a wide variety of specialised and highly skilled trades, encouraged exceptional levels of creativity and innovation and provided an economic base for prosperity that was to last into the final quarter of the 20th century. The Watt steam engine was invented in Birmingham.[14]

The resulting high level of social mobility also fostered a culture of political radicalism which, under leaders from Thomas Attwood to Joseph Chamberlain, was to give it a political influence unparalleled in Britain outside London, and a pivotal role in the development of British democracy.[15] From the summer of 1940 to the spring of 1943, Birmingham was bombed heavily by the German Luftwaffe in what is known as the Birmingham Blitz. The damage done to the city's infrastructure, in addition to a deliberate policy of demolition and new building by planners, led to extensive urban regeneration in subsequent decades.

Birmingham's economy is now dominated by the service sector.[16] The city is a major international commercial centre and an important transport, retail, events and conference hub. Its metropolitan economy is the second-largest in the United Kingdom with a GDP of $121.1bn (2014).[2] Its five universities,[17] including the University of Birmingham, make it the largest centre of higher education in the country outside London.[18] Birmingham's major cultural institutions – the City of Birmingham Symphony Orchestra, the Birmingham Royal Ballet, the Birmingham Repertory Theatre, the Library of Birmingham and the Barber Institute of Fine Arts – enjoy international reputations,[19] and the city has vibrant and influential grassroots art, music, literary and culinary scenes.[20] The city will host the 2022 Commonwealth Games.[21] As of 2014, Birmingham is the fourth-most visited city in the UK by people from foreign nations.

Dublin (/ˈdʌblɪn/; Irish: Baile Átha Cliath,[12] pronounced [ˈbˠalʲə aːhə ˈclʲiə] or [ˌbʲlʲaː ˈclʲiə]) is the capital and largest city of Ireland.[13][14] Situated on a bay on the east coast, at the mouth of the River Liffey, it is in the province of Leinster and the Eastern and Midland Region. It is bordered on the south by the Dublin Mountains, a part of the Wicklow Mountains range. At the 2016 census, it had an urban area population of 1,173,179,[8] while the population of the traditional County Dublin as a whole was 1,347,359.[15] The population of the Greater Dublin Area was 1,904,806.[16]

There is archaeological debate regarding precisely where and when Dublin originated, with a settlement established by the Gaels during or before the 7th century CE,[17] and a second, Viking, settlement, following. As the small Kingdom of Dublin, the city grew, and it became Ireland's principal settlement following the Norman invasion.[17] The city expanded rapidly from the 17th century and was briefly the second largest city in the British Empire after the Acts of Union in 1800. Following independence in 1922, Dublin became the capital of the Irish Free State, later renamed Ireland in 1937.

Dublin is a contemporary and historical centre for Irish education, arts and culture, administration and industry. As of 2018 the city was listed by the Globalization and World Cities Research Network (GaWC) as a global city, with a ranking of "Alpha minus", which places it as one of the top thirty cities in the world.

The name Dublin derives from the Irish word Dubhlinn, early Classical Irish Dubhlind/Duibhlind, from dubh ([d̪uβ], [d̪uw], [d̪uː]) meaning "black, dark", and lind ([lʲiɲ(d̪ʲ)]) "pool", referring to a dark tidal pool. This tidal pool was located where the River Poddle entered the Liffey, on the site of the castle gardens at the rear of Dublin Castle. In Modern Irish the name is Duibhlinn, and Irish rhymes from County Dublin show that in Dublin Leinster Irish it was pronounced Duílinn [ˈd̪ˠiːlʲiɲ]. The original pronunciation is preserved in the names for the city in other languages such as Old English Difelin, Old Norse Dyflin, modern Icelandic Dyflinn and modern Manx Divlyn as well as Welsh Dulyn and Breton Dulenn. Other localities in Ireland also bear the name Duibhlinn, variously anglicised as Devlin,[20] Divlin[21] and Difflin.[22] Historically, scribes using the Gaelic script wrote bh with a dot over the b, rendering Duḃlinn or Duiḃlinn. Those without knowledge of Irish omitted the dot, spelling the name as Dublin. Variations on the name are also found in traditionally Gaelic-speaking areas of Scotland (Gàidhealtachd, cognate with Irish Gaeltacht), such as An Linne Dhubh ("the black pool"), which is part of Loch Linnhe.

It is now thought that the Viking settlement was preceded by a Christian ecclesiastical settlement known as Duibhlinn, from which Dyflin took its name.[23] Beginning in the 9th and 10th century, there were two settlements where the modern city stands. The Viking settlement of about 841, Dyflin, and a Gaelic settlement, Áth Cliath ("ford of hurdles")[24] further up river, at the present day Father Mathew Bridge (also known as Dublin Bridge), at the bottom of Church Street. Baile Átha Cliath, meaning "town of the hurdled ford", is the common name for the city in modern Irish. Áth Cliath is a place name referring to a fording point of the River Liffey near Father Mathew Bridge. Baile Átha Cliath was an early Christian monastery, believed to have been in the area of Aungier Street, currently occupied by Whitefriar Street Carmelite Church. There are other towns of the same name, such as Àth Cliath in East Ayrshire, Scotland, which is anglicised as Hurlford.

Edinburgh (/ˈɛdɪnbərə/ ( listen);[6][7][8] Scottish Gaelic: Dùn Èideann [ˈt̪uːn ˈeːtʲən̪ˠ]; Scots: Edinburgh) is the capital city of Scotland and one of its 32 council areas. Historically part of the county of Midlothian (or Edinburghshire), it is located in Lothian on the Firth of Forth's southern shore.

Recognised as the capital of Scotland since at least the 15th century, Edinburgh is the seat of the Scottish Government, the Scottish Parliament and the supreme courts of Scotland. The city's Palace of Holyroodhouse is the official residence of the monarchy in Scotland. The city has long been a centre of education, particularly in the fields of medicine, Scots law, literature, the sciences and engineering. It is the second largest financial centre in the United Kingdom (after London)[9] and the city's historical and cultural attractions have made it the United Kingdom's second most popular tourist destination, attracting over one million overseas visitors each year.[10]

Edinburgh is Scotland's second most populous city and the seventh most populous in the United Kingdom. The official population estimates are 464,990 (2012) for the Locality of Edinburgh (Edinburgh pre 1975 regionalisation plus Currie and Balerno),[1] 513,210 (2017) for the City of Edinburgh,[2] and 1,339,380 (2014) for the city region.[2][3] Edinburgh lies at the heart of the Edinburgh and South East Scotland city region comprising East Lothian, Edinburgh, Fife, Midlothian, Scottish Borders and West Lothian.[11]

The city is the annual venue of the General Assembly of the Church of Scotland. It is home to national institutions such as the National Museum of Scotland, the National Library of Scotland and the Scottish National Gallery. The University of Edinburgh, founded in 1582 and now one of four in the city, was placed 23rd in the QS World University Rankings in 2018.[12] The city is also famous for the Edinburgh International Festival and the Fringe, the latter being the world's largest annual international arts festival. Historic sites in Edinburgh include Edinburgh Castle, the Palace of Holyroodhouse, the churches of St. Giles, Greyfriars and the Canongate, and the extensive Georgian New Town, built in the 18th/19th centuries. Edinburgh's Old Town and New Town together are listed as a UNESCO World Heritage site,[13] which has been managed by Edinburgh World Heritage since 1999.

London (/ˈlʌndən/ ( listen) LUN-dən) is the capital and most populous city of England and the United Kingdom.[8][9] Standing on the River Thames in the south east of the island of Great Britain, London has been a major settlement for two millennia. It was founded by the Romans, who named it Londinium.[10] London's ancient core, the City of London, largely retains its 1.12-square-mile (2.9 km2) medieval boundaries. Since at least the 19th century, "London" has also referred to the metropolis around this core, historically split between Middlesex, Essex, Surrey, Kent and Hertfordshire,[11][12][13] which today largely makes up Greater London,[14][15][note 1] a region governed by the Mayor of London and the London Assembly.[16][note 2][17]

London is one of the leading global cities[18][19] in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism and transportation.[20][21][22] It is the world's largest financial centre[23][24][25][26] and has the fifth or sixth largest metropolitan area GDP in the world.[note 3][27][28] London is often regarded as a world cultural capital.[29][30][31] It is the world's most-visited city as measured by international arrivals[32] and has the world's largest city airport system measured by passenger traffic.[33] It is the world's leading investment destination,[34][35][36][37] hosting more international retailers[38][39] and ultra high-net-worth individuals[40][41] than any other city. London's universities form the largest concentration of higher education institutes in Europe.[42] In 2012, London became the first city to have hosted the modern Summer Olympic Games three times.[43]

London has a diverse range of people and cultures, and more than 300 languages are spoken in the region.[44] Its estimated mid-2016 municipal population (corresponding to Greater London) was 8,787,892,[4] the largest of any city in the European Union[45] and accounting for 13.4% of the UK population.[46] London's urban area is the second most populous in the EU, after Paris, with 9,787,426 inhabitants at the 2011 census.[47] The city's metropolitan area is the most populous in the EU with 14,040,163 inhabitants in 2016,[note 4][3] while the Greater London Authority states the population of the city-region (covering a large part of the south east) as 22.7 million.[48][49] London was the world's most populous city from around 1831 to 1925.[50]

London contains four World Heritage Sites: the Tower of London; Kew Gardens; the site comprising the Palace of Westminster, Westminster Abbey, and St Margaret's Church; and the historic settlement of Greenwich (in which the Royal Observatory, Greenwich defines the Prime Meridian, 0° longitude, and GMT).[51] Other landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Paul's Cathedral, Tower Bridge, Trafalgar Square and The Shard. London is home to numerous museums, galleries, libraries, sporting events and other cultural institutions, including the British Museum, National Gallery, Natural History Museum, Tate Modern, British Library and West End theatres.[52] The London Underground is the oldest underground railway network in the world.