 At various times, the Christians risked persecution, although the earliest known Christian martyrs in Britain – Saint Alban and "Amphibalus" – probably lived in the early 4th century.Julius and Aaron, citizens of Caerleon, were said to have been martyred during the Diocletianic Persecution, although there is no textual or archaeological evidence to support the folk etymology of Lichfield as deriving from another thousand martyrs during the same years.Christianization intensified with the legalisation of the Christian religion under Constantine the Great in the early 4th century and its promotion by subsequent Christian emperors.