London is the capital of the United Kingdom, a city on the River Thames in southeastern England that has served as a center of government, trade, and culture for nearly two thousand years. Today it is governed as Greater London, a metropolitan area built from dozens of boroughs around the historic City of London, and its skyline is defined by the clock tower that houses Big Ben.

Where Is London Located?

London sits on the River Thames in southeastern England, roughly 50 miles from the river’s mouth on the North Sea. Modern London is governed as Greater London, an administrative area made up of 32 boroughs plus the historic City of London, overseen by the Greater London Authority, a strategic citywide body created in 2000 that is led by an elected mayor and a separately elected London Assembly.

A Brief History of London

London began as Londinium, a settlement the Romans founded on the Thames around 43 CE as part of their conquest of Britain, and it grew over subsequent centuries into England’s largest city and eventual capital. A clock has stood at the heart of English government at the Palace of Westminster since at least the 1290s, with records confirming a replacement clock there in 1367 that is considered the first public chiming clock in England, according to the UK Parliament. After a fire destroyed much of the old Palace of Westminster in 1834, architect Charles Barry designed a new palace that included a clock tower, with construction beginning in 1843.

Government and Modern London

London is the seat of the United Kingdom’s national government, housing Parliament at the Palace of Westminster, while separately being administered at the city level by the Greater London Authority and its elected mayor. This two-tier structure, national government and city government sharing the same urban space, has defined London’s governance since devolution created the modern Greater London Authority in 2000.

What Is London Known For?

London’s most recognizable landmark is the Elizabeth Tower at the Palace of Westminster, popularly known by the name of its main bell, Big Ben. The tower’s great clock began operating on May 31, 1859, though the bell itself initially cracked during testing in 1856 and was recast in 1858 before resuming regular service by 1863. The BBC first broadcast the bell’s chimes on radio on New Year’s Eve 1923, and the tower was formally renamed the Elizabeth Tower in 2012 to mark Queen Elizabeth II’s Diamond Jubilee, according to the UK Parliament, which maintains the building. The tower underwent an extensive conservation project between 2017 and 2022.

Why London Matters

London matters as both the political center of the United Kingdom and one of the world’s leading global cities for finance, culture, and international affairs, a role it has built on nearly two millennia of continuous settlement since its founding as a Roman port town. Its landmark clock tower, rebuilt after fire and renamed in honor of a modern monarch, embodies the way London’s institutions have continuously adapted while remaining visibly rooted in its history.

Key Takeaways

• London began as the Roman settlement of Londinium, founded on the River Thames around 43 CE.
• Modern London is governed as Greater London, made up of 32 boroughs and the City of London, under the Greater London Authority created in 2000.
• A clock has stood at the Palace of Westminster since at least the 1290s, predating the current Elizabeth Tower by centuries.
• Big Ben’s Great Clock began operating on May 31, 1859; the tower was renamed the Elizabeth Tower in 2012.
• London serves simultaneously as the seat of UK national government and as a separately governed global city.

Sources

• UK Parliament, “A Brief History of Big Ben and Elizabeth Tower”

Editorially reviewed by Specialty Digest Editorial TeamLast reviewed October 5, 2026Researched and drafted with AI assistanceReport an issue