The history of London, the capital city of England and the United Kingdom, extends over 2000 years. In that time, it has become one of the world's most significant financial and cultural capital cities. It has withstood plague, devastating fire, civil war, aerial bombardment, terrorist attacks, and riots.
The City of London, often referred to simply as "the City", is the historic core of the Greater London area, and is today its primary financial district, though it represents only a small part of the wider metropolis.
According to the legendary Historia Regum Britanniae, by Geoffrey of Monmouth, London was founded by Brutus of Troy about 1000–1100 B.C. after he defeated the native giant Gogmagog; the settlement was known as Caer Troia, Troia Nova (Latin for New Troy), which, according to a pseudo-etymology, was corrupted to Trinovantum. Trinovantes were the Iron Age tribe who inhabited the area prior to the Romans. Geoffrey provides prehistoric London with a rich array of legendary kings, such as Lud (see also Lludd, from Welsh mythology) who, he claims, renamed the town Caer Ludein, from which London was derived, and was buried at Ludgate.
Some recent discoveries indicate probable very early settlements near the Thames in the London area. In 1993, the remains of a Bronze Age bridge were found on the Thames's south foreshore, upstream of Vauxhall Bridge. This bridge either crossed the Thames, or went to a now lost island in the river. Dendrology dated the timbers to between 1750 BC and 1285 BC. In 2001, a further dig found that the timbers were driven vertically into the ground on the south bank of the Thames west of Vauxhall Bridge. In 2010, the foundations of a large timber structure, dated to between 4,800 BC and 4,500 BC, were found, again on the foreshore south of Vauxhall Bridge. The function of the mesolithic structure is not known. All these structures are on the south bank at a natural crossing point where the River Effra flows into the Thames.
Numerous finds have been made of spear heads and weaponry from the Bronze and Iron Ages near the banks of the Thames in the London area, many of which had clearly been used in battle. This suggests that the Thames was an important tribal boundary.
Archaeologist Leslie Wallace notes that "Because no LPRIA [Late pre-Roman Iron Age] settlements or significant domestic refuse have been found in London, despite extensive archaeological excavation, arguments for a purely Roman foundation of London are now common and uncontroversial."
Londinium was established as a civilian town by the Romans about four years after the invasion of AD 43. Early Roman London occupied a relatively small area, roughly equivalent to the size of Hyde Park. In around AD 60, it was destroyed by the Iceni led by their queen Boudica. The city was quickly rebuilt as a planned Roman town and recovered after perhaps 10 years, the city growing rapidly over the following decades.
Until recently it was believed that Anglo-Saxon settlement initially avoided the area immediately around Londinium. However, the discovery in 2008 of an Anglo-Saxon cemetery at Covent Garden indicates that the incomers had begun to settle there at least as early as the 6th century and possibly in the 5th. The main focus of this settlement was outside the Roman walls, clustering a short distance to the west along what is now the Strand, between the Aldwych and Trafalgar Square. Recent excavations have also highlighted the population density and relatively sophisticated urban organisation of this earlier Anglo-Saxon London, which was laid out on a grid pattern and grew to house a likely population of 10-12,000.
The new Norman regime established new fortresses within the city to dominate the native population. By far the most important of these was the Tower of London at the eastern end of the city, where the initial timber fortification was rapidly replaced by the construction of the first stone castle in England. The smaller forts of Baynard's Castle and Montfichet's Castle were also established along the waterfront. King William also granted a charter in 1067 confirming the city's existing rights, privileges and laws.
In 1475, the Hanseatic League set up its main English trading base (kontor) in London, called Stalhof or Steelyard. It existed until 1853, when the Hanseatic cities of Lübeck, Bremen and Hamburg sold the property to South Eastern Railway. Woollen cloth was shipped undyed and undressed from 14th/15th century London to the nearby shores of the Low Countries, where it was considered indispensable.
London's expansion beyond the boundaries of the City was decisively established in the 17th century. In the opening years of that century the immediate environs of the City, with the principal exception of the aristocratic residences in the direction of Westminster, were still considered not conducive to health. Immediately to the north was Moorfields, which had recently been drained and laid out in walks, but it was frequented by beggars and travellers, who crossed it in order to get into London. Adjoining Moorfields were Finsbury Fields, a favourite practising ground for the archers, Mile End, then a common on the Great Eastern Road and famous as a rendezvous for the troops.
The 18th century was a period of rapid growth for London, reflecting an increasing national population, the early stirrings of the Industrial Revolution, and London's role at the centre of the evolving British Empire. In 1707, an Act of Union was passed merging the Scottish and the English Parliaments, thus establishing the Kingdom of Great Britain. A year later, in 1708 Christopher Wren's masterpiece, St Paul's Cathedral was completed on his birthday. However, the first service had been held on 2 December 1697; more than 10 years earlier. This Cathedral replaced the original St. Paul's which had been completely destroyed in the Great Fire of London. This building is considered one of the finest in Britain and a fine example of Baroque architecture.