History: London, England, United Kingdom

Although there is evidence of scattered Brythonic settlements in the area, the first major settlement was founded by the Romans in 43 AD. This lasted for just seventeen years and around 61, the Iceni tribe led by Queen Boudica stormed it, burning it to the ground. The next, heavily planned incarnation of the city prospered and superseded Colchester as the capital of the Roman province of Britannia in 100. At its height during the 2nd century, Roman London had a population of around 60,000. By the 7th century, the Anglo-Saxons had created a new settlement called Lundenwic over a mile (2 km) upstream from the old Roman city, around what is now Covent Garden.
It is likely that there was a harbour at the mouth of the River Fleet for fishing and trading, and this trading grew, until the city was overcome by the Vikings and forced to move east, back to the location of the Roman Londinium, in order to use its walls for protection. Viking attacks continued to increase, until 886 when Alfred the Great recaptured London and made peace with the Danish leader, Guthrum. The original Saxon city of Lundenwic became Ealdwic ("old city"), a name surviving to the present day as Aldwych, which is in the modern City of Westminster.