City of London in the context of "Z/Yen"

A central business district (CBD) is the commercial and business center of a city. It contains commercial space and offices, and in larger cities will often be described as a financial district. Geographically, it often coincides with the "city centre" or "downtown". However, these concepts are not necessarily synonymous: many cities have a central business district located away from its traditional city center, and there may be multiple CBDs within a single urban area. The CBD will often be highly accessible and have a large variety and concentration of specialised goods and services compared to other parts of the city.

In Chicago, the Chicago Loop is the second-largest central business district in the United States. It is also referred to as the core of the city's downtown.

An oath of allegiance is an oath whereby a subject or citizen acknowledges a duty of allegiance and swears loyalty to a monarch or a country. In modern republics, oaths are sworn to the country in general, or to the country's constitution. For example, officials in the United States, take an oath of office that includes swearing allegiance to the United States Constitution. However, typically in a constitutional monarchy, such as in the United Kingdom, Australia, and other Commonwealth realms, oaths are sworn to the monarch. Armed forces typically require a military oath.

In feudal times, a person would also swear allegiance to their feudal superiors. To this day the oath sworn by freemen of the City of London contains an oath of obedience to the Lord Mayor of the City of London.

London is the capital and largest city of both England and the United Kingdom, with a population of 9.1 million people in 2024. Its wider metropolitan area is the largest in Western Europe, with a population of 15.1 million. London stands on the River Thames in southeast England, at the head of a 50-mile (80 km) tidal estuary down to the North Sea, and has been a major settlement for nearly 2,000 years. Its ancient core and financial centre, the City of London, was founded by the Romans as Londinium and has retained its medieval boundaries. The City of Westminster, to the west of the City of London, has been the centuries-long host of the national government and parliament. London grew rapidly in the 19th century, becoming the world's largest city at the time. Since the 19th century the name "London" has referred to the metropolis around the City of London, historically split between the counties of Middlesex, Essex, Surrey, Kent and Hertfordshire, which since 1965 has largely comprised the administrative area of Greater London, governed by 33 local authorities and the Greater London Authority.

As one of the world's major global cities, London exerts a strong influence on world art, entertainment, fashion, commerce, finance, education, healthcare, media, science, technology, tourism, transport and communications. London is Europe's largest city economy and one of the world's major financial centres. London hosts Europe's largest concentration of higher education institutions, comprising over 50 universities and colleges and enrolling more than 500,000 students as at 2023. It is home to several of the world's leading academic institutions: Imperial College London, internationally recognised for its excellence in natural and applied sciences, and University College London (UCL), a comprehensive research-intensive university, consistently rank among the top ten globally. Other notable institutions include King's College London (KCL), highly regarded in law, humanities and health sciences; the London School of Economics (LSE), globally prominent in social sciences and economics; and specialised institutions such as the Royal College of Art (RCA), Royal Academy of Music (RAM), the Royal Academy of Dramatic Art (RADA), the School of Oriental and African Studies (SOAS) and London Business School (LBS). It is the most-visited city in Europe and has the world's busiest city airport system. The London Underground is the world's oldest rapid transit system.

The Kingdom of England was a sovereign state on the island of Great Britain from the 10th century, when it was unified from various Anglo-Saxon kingdoms, until 1 May 1707, when it united with Scotland to form the Kingdom of Great Britain, which would later become the United Kingdom. The Kingdom of England was among the most powerful states in Europe during the medieval and early modern periods.

Beginning in the year 886 Alfred the Great reoccupied London from the Danish Vikings and after this event he declared himself King of the Anglo-Saxons, until his death in 899. During the early tenth century, the various Anglo-Saxon kingdoms were united by Alfred's descendants Edward the Elder (reigned 899–924) and Æthelstan (reigned 924–939) to form the Kingdom of the English. In 927, Æthelstan conquered the last remaining Viking kingdom, York, making him the first Anglo-Saxon ruler of the whole of England. In 1016, the kingdom became part of the North Sea Empire of Cnut the Great, a personal union between England, Denmark and Norway. The Norman Conquest in 1066 led to the transfer of the English capital city and chief royal residence from the Anglo-Saxon one at Winchester to Westminster, and the City of London quickly established itself as England's largest and principal commercial centre.

Westminster is the main settlement of the City of Westminster in Central London, England. It extends from the River Thames to Oxford Street and has many famous landmarks, including the Palace of Westminster, Buckingham Palace, Westminster Abbey, Westminster Cathedral, Trafalgar Square and much of the West End cultural centre including the entertainment precinct of West End theatre.

The name (Old English: Westmynstre) originated from the informal description of the abbey church and royal peculiar of St Peter's (Westminster Abbey), west of the City of London (until the English Reformation there was also an Eastminster abbey, on the other side of the City of London, in the East End of London). The abbey's origins date from between the 7th and 10th centuries, but it rose to national prominence when rebuilt by Edward the Confessor in the 11th century. With the development of the old palace alongside the abbey, Westminster has been the home of England's government since about 1200, and from 1707 the Government of the United Kingdom. In 1539, it became a city.

The West End of London (commonly referred to as the West End) is a district of Central London, England, in the London Boroughs of Camden and the City of Westminster. It is west of the City of London and north of the River Thames, in which many of the city's major tourist attractions, shops, businesses, government buildings and entertainment venues, including West End theatres, are concentrated - and as such the term "West End" is used internationally as a metonym for London's theatre district and associated performing arts scene - just as "Broadway" is used to describe that of New York City.

The term was first used in the early 19th century to describe fashionable areas to the west of Charing Cross.

The London Borough of Camden (/ˈkæmdən/ ) is a borough in Inner London, England. Camden Town Hall, on Euston Road, lies 1.4 mi (2.3 km) north of Charing Cross. The borough was established on 1 April 1965 from the former metropolitan boroughs of Holborn, St Pancras and Hampstead.

To the south it shares with the City of Westminster parts of the West End, where it also borders the City of London. The cultural and commercial land uses in the south contrast with the bustling mixed-use districts such as Camden Town and Kentish Town in the centre and leafy residential areas around Hampstead Heath in the north. Well known attractions include The British Museum, The British Library, the famous views from Parliament Hill, the London Zoo, the BT Tower, the converted Roundhouse entertainment venue, and Camden Market. As of 2021 it has a population of 210,136. Politically, its local authority is Camden London Borough Council.

The Lady Mayor of London is the mayor of the City of London, England, and the leader of the City of London Corporation. Within the City, the Lady Mayor is accorded precedence over all individuals except the sovereign and retains various traditional powers, rights, and privileges, including the title and style The Right Honourable Lady Mayor of London.

One of the world's oldest continuously elected civic offices, it is entirely separate from the directly elected mayor of London, a political office controlling a budget which covers the much larger area of Greater London. Dame Susan Langley serves as the 697th Lord/Lady Mayor (for 2025–2026).

Londinium, also known as Roman London, was the capital of Roman Britain during most of the period of Roman rule. Most twenty-first century historians think that it was originally a settlement established shortly after the Claudian invasion of Britain, on the current site of the City of London, around 47–50 AD, but some defend an older view that the city originated in a defensive enclosure constructed during the Claudian invasion in 43 AD. Its earliest securely-dated structure is a timber drain of 47 AD. It sat at a key ford at the River Thames which turned the city into a road nexus and major port (which was built between 49 and 52 AD), serving as a major commercial centre in Roman Britain until its abandonment during the 5th century.

Following the foundation of the town in the mid-1st century, early Londinium occupied the relatively small area of 1.4 km (0.5 sq mi), roughly half the area of the modern City of London and equivalent to the size of present-day Hyde Park. In 60 or 61 AD, the rebellion of the Iceni under their queen, Boudica, compelled the Roman forces to abandon the settlement, which was then razed. Following the defeat of Boudica by the Roman governor Gaius Suetonius Paulinus a military installation was established, and the city was rebuilt. It had probably largely recovered within about a decade. During the later decades of the 1st century, Londinium expanded rapidly, becoming Britannia's largest city, and it was provided with large public buildings such as a forum and amphitheatre. By the 2nd century, Londinium had grown to perhaps 30,000 or 60,000 people, almost certainly replacing Camulodunum (Colchester) as the provincial capital, and by the mid-2nd century Londinium was at its height. Its forum basilica was one of the largest structures north of the Alps when Emperor Hadrian visited Londinium in 122. Excavations have discovered evidence of a major fire that destroyed much of the city shortly thereafter, but the city was again rebuilt. By the second half of the 2nd century, Londinium appears to have shrunk in both size and population.