History: London, England, United Kingdom

Middle Ages
With the collapse of Roman rule in the early 5th century, London was effectively abandoned. However, from the 6th century an Anglo-Saxon settlement known as Lundenwic developed slightly to the west of the old Roman city, around what is now Covent Garden and the Strand, rising to a likely population of 10–12,000. In the 9th century London was repeatedly attacked by Vikings, leading to a relocation of the city back to the location of Roman Londinium, in order to use its walls for protection. Following the unification of England in the 10th century London, already the country's largest city and most important trading centre, became increasingly important as a political centre, although it still faced competition from Winchester, the traditional centre of the kingdom of Wessex.
th century King Edward the Confessor re-founded and rebuilt Westminster Abbey and Westminster, a short distance upstream from London became a favoured royal residence. From this point onward Westminster steadily supplanted the City of London itself as a venue for the business of national government.