Deruvian (Medieval Latin: Deruvianus), also known by including Damian, was a possibly legendary 2nd-century bishop and saint, said to have been sent by the pope to answer King Lucius's request for baptism and conversion to Christianity. Together with his companion St Fagan, he was sometimes reckoned as the apostle of Britain. King Lucius's letter (in most accounts, to Pope Eleutherius) may represent earlier traditions but does not appear in surviving sources before the 6th century; the names of the bishops sent to him does not appear in sources older than the early 12th century, when their story was used to support the independence of the bishops of St Davids in Wales and the antiquity of the Glastonbury Abbey in England. The story became widely known following its appearance in Geoffrey