Question: Saint Constantine developed the main administrative divisions of what?

Context paragraphs:
Provinces of China: Provinces (), formally provincial-level administrative divisions () or first-level administrative divisions (), are the highest-level Chinese administrative divisions.  There are 33 such divisions, classified as 22 provinces (not including Taiwan, which is claimed but not actually controlled by the People's Republic of China), four municipalities, five autonomous regions, and two Special Administrative Regions.

Constantine Bay: Constantine Bay (Cornish: Eglos Costentin , meaning "church of St Constantine") is a village and beach on the Atlantic coast of north Cornwall, England, United Kingdom.  It is situated approximately three miles (5 km) west of Padstow and is in the parish of St Merryn.  The beach is popular with surfers and has lifeguard patrols in the summer.  Constantine Bay is named after Saint Constantine, a 6th-century Cornish saint possibly identified with a minor British king Constantine.  St Constantine's Well, an historic site, is accessible by public right of way on Trevose Golf Club's golf course.  The area was a favourite holiday location of Margaret Thatcher during her premiership and also of former Prime Minister David Cameron.

Constantine the Great: 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.

Theme (Byzantine district): 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.

Lands administrative divisions of Tasmania: The Lands administrative divisions of Tasmania refer to the division of Tasmania into land districts and parishes for cadastral purposes, which are part of the lands administrative divisions of Australia.  There are 20 land districts in Tasmania, although in the early nineteenth century there were several other systems, with 18 or 36 counties and 9 other divisions used, as well as hundreds.  The land districts include the 18 former counties of the island of Tasmania which were renamed but retain the same boundaries, plus King Island and Flinders Island.  The counties are referenced in the 1911 Britannica, with Hobart described as being in Buckingham County, Launceston in Cornwall County and Beaconsfield in Devon County.  The land districts are used for land titles today, while the Local Government Areas of Tasmania with cities and municipalities are used for political and administrative purposes.

Administrative divisions of North Korea: The administrative divisions of North Korea are organized into three hierarchical levels.  These divisions were discovered in 2002.  Many of the units have equivalents in the system of South Korea.  At the highest level are nine provinces, two directly governed cities, and three special administrative divisions.  The second-level divisions are cities, counties, wards, and districts.  These are further subdivided into third-level entities: towns, neighborhoods, villages, and "workers' districts".

Agios Konstantinos, East Attica: Agios Konstantinos (Greek: Άγιος Κωνσταντίνος meaning Saint Constantine, before 1954: Καμάριζα - "Kamariza") is a village and a former community in East Attica, Greece.  Since the 2011 local government reform it is part of the municipality Lavreotiki, of which it is a municipal unit.  It was named after Saint Constantine.

Districts of Pakistan: The Districts of Pakistan (Urdu: ‎ ), are the third order administrative divisions of Pakistan.  Districts are the third order of administrative divisions, below provinces and "divisions".  Although the "divisions" were abolished due to the reforms of August 2000, Punjab province restored them back in 2008 followed by Balochistan in 2009, Sindh in 2011 and Khyber Pakhtunkhwa in 2013.  Nevertheless, the 149 districts still form the top tier of a three-tier system of local government with the two lower tiers composed of approximately 596 tehsils (included the Kashmir region) and more than 6,000 union councils.

Administrative divisions of Khmelnytskyi Oblast: The administrative divisions of Khmelnytskyi Oblast (Ukrainian: Хмельницька область ) follows the general scheme of the administrative divisions in Ukraine.  As Ukraine is a unitary state, any changes to the administrative divisions have to be approved by the Verkhovna Rada.

List of villages in China: This is a list of villages in China.  A village is a clustered human settlement or community, larger than a hamlet but smaller than a town, with a population ranging from a few hundred to a few thousand.  In China, an administrative village is a fifth-level administrative division, underneath a township, county, city, and province.  There are more than six hundred thousand administrative villages in China.  Some villages are not administrative villages but natural villages, which are not administrative divisions.  The below list is divided by province, and lists the name of the village followed by the three higher- administrative divisions (e.g. township, county, and city) to which it belongs administratively, or "" if that information is not known.

Supporting paragraphs: Theme (Byzantine district) Constantine the Great
Answer: middle Eastern Roman Empire