Moriarty's Game: The Professor's Invitation by HiddenCity

London is the capital and largest city of England and the United Kingdom. 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.