He served
Licinius as
praetorian prefect from at least spring 315 to September 324, until
Constantine I definitively defeated Licinius. However, the fall of Licinius did not mark the end of Julianus' career, as Constantine had praised Julianus' administration of the State and chose him, in 325, as suffect to replace a consul fallen in disgrace,
Valerius Proculus. He also served as
Praefectus Aegypti in 328. He was the father of
Basilina, wife of Constantine's half-brother
Julius Constantius and mother of Emperor
Julian, and of the mother of
Procopius; he was probably related to
Eusebius of Nicomedia. Julianus was the master of the
Gothic philosopher slave
Mardonius, who was the teacher of both Basilina and Julian. == Notes ==