London is the capital city of England and the United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its founding by the Romans, who named it Londinium.
London's ancient core, the City of London, largely retains its square-mile medieval boundaries. Since at least the 19th century, the name London has also referred to the metropolis developed around this core. The bulk of this conurbation forms the London region and the Greater London administrative area, governed by the elected Mayor of London and the London Assembly.
After Robert Thorn is appointed US Ambassador to Great Britain, he, his wife Katherine, and their two-year-old son Damien move to London from Rome. After three years, Robert returns to Rome from England with Keith Jennings to investigate Damien's origins. After Katherine is murdered by Mrs. Baylock, and Robert is shot and killed while trying to stab Damien after returning from Israel, their bodies are sent back to the U.S.
At some point after becoming heir to Thorn Industries, Damien Thorn returned to England and moved back to London. When Damien orders the Disciples of the Watch to massacre every baby boy born in Britain on 24 March (in an attempt to avert the Second Coming of Christ and Damien's subsequent defeat), London is among the cities affected.