For ten points, identify this last pagan Roman emperor.
This man is the primary subject of Ammianus Marcellinuis' Rerum gestarum libri, and after the death of his mother Basilina, this man was raised together with his half-brother Gallus by Eusebius of Nicomedia. On succeeding to his highest office, this man invited Maximus of Ephesus to serve as his advisor, and his philosophical work can be found in a tract entitled "Against the Galileans." His success in Gaul against the Alemanni and the Franks frightened his cousin Constantius II, whom this man succeeded upon the latter's death. Among this man's domestic policies was an edict ordering religious tolerance, and he began a project to rebuild the Temple in Jerusalem. After converting to an Iamblichan version of Neoplatonism, this man proclaimed the cult of the Unconquered Sun engaged in persecution of Christians, but his death during a campaign against the Persians in 363 ended his 20-month long reign. For ten points, identify this last pagan Roman emperor.
This man is the primary subject of Ammianus Marcellinuis' Rerum gestarum libri, and after the death of his mother Basilina, this man was raised together with his half-brother Gallus by Eusebius of Nicomedia.
Flavius Claudius Julianus [or Julian the Apostate]