When the Prefecture was divided between the Western and Eastern Empires in 379 , the Macedonian provinces were included in Eastern Illyricum .
These provinces were all subordinate to the Diocese of Macedonia , one of three dioceses comprising the praetorian prefecture of Illyricum .
When the Prefecture was divided between the Western and Eastern Empires in 379 , the Macedonian provinces were included in Illyricum   .
These provinces were all subordinate to the Diocese of Macedonia , one of three dioceses comprising the praetorian prefecture of Illyricum .