[PAR] [TLE] Theme (Byzantine district) [SEP] The themes or themata (Greek: θέματα ; singular θέμα, "thema") were the main administrative divisions of the middle Eastern Roman Empire.  They were established in the mid-7th century in the aftermath of the Slavic invasion of the Balkans and Muslim conquests of parts of Byzantine territory, and replaced the earlier provincial system established by Diocletian and Constantine the Great.  In their origin, the first themes were created from the areas of encampment of the field armies of the East Roman army, and their names corresponded to the military units that had existed in those areas.  The theme system reached its apogee in the 9th and 10th centuries, as older themes were split up and the conquest of territory resulted in the creation of new ones.  The original theme system underwent significant changes in the 11th and 12th centuries, but the term remained in use as a provincial and financial circumscription until the very end of the Empire. [PAR] [TLE] Constantine the Great [SEP] Constantine the Great (Latin: "Flavius Valerius Aurelius Constantinus Augustus" ; Greek: Κωνσταντῖνος ὁ Μέγας ; 27 February 272 AD – 22 May 337 AD), also known as Constantine I or Saint Constantine (in the Orthodox Church as Saint Constantine the Great, Equal-to-the-Apostles), was a Roman Emperor of Illyrian-Greek origin from 306 to 337 AD.  He was the son of Flavius Valerius Constantius, a Roman Army officer, and his consort Helena.  His father became "Caesar", the deputy emperor in the west, in 293 AD.  Constantine was sent east, where he rose through the ranks to become a military tribune under Emperors Diocletian and Galerius.  In 305, Constantius raised himself to the rank of "Augustus", senior western emperor, and Constantine was recalled west to campaign under his father in Britannia (Britain).  Constantine was acclaimed as emperor by the army at Eboracum (modern-day York) after his father's death in 306 AD, and he emerged victorious in a series of civil wars against Emperors Maxentius and Licinius to become sole ruler of both west and east by 324 AD.
[PAR] [TLE] Theme ( Byzantine district ) [ SEP ] The themes or themata ( Greek : θέματα ; singular θέμα , " thema " ) were the main administrative divisions of the middle Eastern Roman Empire . They were established in the mid-7th century in the aftermath of the Slavic invasion of the Balkans and Muslim conquests of parts of Byzantine territory , and replaced the earlier provincial system established by Diocletian and Constantine the Great . In their origin , the first themes were created from the areas of encampment of the field armies of the East Roman army , and their names corresponded to the military units that had existed in those areas . The theme system reached its apogee in the 9th and 10th centuries , as older themes were split up and the conquest of territory resulted in the creation of new ones . The original theme system underwent significant changes in the 11th and 12th centuries , but the term remained in use as a provincial and financial circumscription until the very end of the Empire . [PAR] [TLE] Constantine the Great [ SEP ] Constantine the Great ( Latin : " Flavius Valerius Aurelius Constantinus Augustus " ; Greek : Κωνσταντῖνος ὁ Μέγας ; 27 February 272 AD – 22 May 337 AD ) , also known as Constantine I or Saint Constantine ( in the Orthodox Church as Saint Constantine the Great , Equal - to - the - Apostles ) , was a Roman Emperor of Illyrian - Greek origin from 306 to 337 AD . He was the son of Flavius Valerius Constantius , a Roman Army officer , and his consort Helena . His father became " Caesar " , the deputy emperor in the west , in 293 AD . Constantine was sent east , where he rose through the ranks to become a military tribune under Emperors Diocletian and Galerius . In 305 , Constantius raised himself to the rank of " Augustus " , senior western emperor , and Constantine was recalled west to campaign under his father in Britannia ( Britain ) . Constantine was acclaimed as emperor by the army at Eboracum ( modern - day York ) after his father 's death in 306 AD , and he emerged victorious in a series of civil wars against Emperors Maxentius and Licinius to become sole ruler of both west and east by 324 AD .
Saint Constantine developed the main administrative divisions of what?
Saint Constantine developed the main administrative divisions of what ?
middle Eastern Roman Empire
middle Eastern Roman Empire