From the Wikipedia page on the Bishops of London According to a 12th-century list, which may be recorded by Jocelyne of Furness, there had been 14 "archbishops" of London, claiming London's Christian community was founded in the 2nd century under the legendary King Lucius and his missionary saints Fagan, Deruvian, Elvanus, and Medwin. None of that is considered credible by modern historians but, although the surviving text is problematic, either Bishop Restitutus or Adelphius at the 314 Council of Arles seems to have come from Londinium. However, according to later sources, there had been 16 Romano-British "bishops" of London.