Lucius (Welsh: Lles map Coel, Lleirwg, Lleufer or Lleufer Mawr) was a supposed 2nd-century king of the Britons traditionally credited with introducing Christianity into Britain. Lucius is first mentioned in a 6th-century version of the Liber Pontificalis, which says that he sent a letter to Pope Eleutherius asking to be made a Christian. The story became widespread after it was repeated in the 8th century by Bede, who added the detail that after Eleutherius granted Lucius' request, the Britons followed their king in conversion and maintained the Christian faith until the Diocletianic Persecution of 303. Later writers expanded the story, giving accounts of missionary activity under Lucius and attributing to him the foundation of certain churches.[1]