<P> In Parke Godwin's Firelord, Ambrosius is the elderly tribune of the diminished, dispirited and politically fractured Legio VI Victrix garrisoning Hadrian's Wall . Near his death, he names Artorius Pendragon (Arthur) as his successor, encourages him to convert the legion to alae (heavy cavalry) and allows the legionnaires to renounce their loyalty to Rome and take personal oaths of fealty to Artorius in order to help unify Brittania politically and to create a military force with the ability to quickly redeploy to meet differing threats . </P> <P> In Jack Whyte's Camulod Chronicles, Ambrosius Aurelianus is the half - brother of Caius Merlyn Britannicus (Merlin) and helps him lead the people of Camulod (Camelot). </P> <P> In Stargate SG - 1, Ambrosius and Arthur are one and the same . Merlin was an Ancient, fleeing from Atlantis and later Ascends, then comes back in order build the Sangraal, or Holy Grail, to defeat the Ori . Daniel Jackson also comments that it would mean that Ambrosius was 74 at the Battle of Mount Badon . </P>

Who served as bishop of milan during the fourth century