His military exploits include a victory over the Alemanni as Gallic Caesar in 357 and the abortive Persian campaign on which he died as sole emperor in 361.  
He wrote two Neo-Platonic works "A Hymn to King Helios" and "A Hymn to the Mother Goddess" as well as two panegyrics in honor of his cousin Constantius II.  Other literary achievements include "The Caesars" a satire about Roman emperors and "The Beard-Haters" about the ingratitude of the citizens of Antioch.  His military exploits include a victory over the Alemanni as Gallic Caesar in 357 and the abortive Persian campaign on which he died as sole emperor in 361.  FTP name this man most famous for trying to turn the Roman empire back toward paganism, called "The Apostate"
He wrote two Neo-Platonic works "A Hymn to King Helios" and "A Hymn to the Mother Goddess" as well as two panegyrics in honor of his cousin Constantius II.  
Flavius Claudius Julianus