Diocese of Moesia

Diocese of Moesia Dioecesis Moesiarum
Diocese of the Roman Empire
ca. 293 – before 337
Dioceses in 300 AD
Historical era		Late Antiquity
•	Administrative reform	ca. 293
•	Division in two dioceses	before 337

The Diocese of Moesia (Latin: Dioecesis Moesiarum, Greek: Διοίκησις Μοισιών) was one of the twelve dioceses in which Diocletian (r. 284–305) divided the Roman Empire during his administrative reforms. It encompassed most of the central Balkans and the Greek peninsula, stretching from the Danube to Crete. The diocese was split in two, forming the Diocese of Macedonia in the south and the Diocese of Dacia in the north, probably under Constantine I (r. 306–337), although it is not attested until ca. 370. The two new diocese were grouped into the new praetorian prefecture of Illyricum in the second half of the 4th century, which essentially covered the same area as the Diocese of Moesia.^[1]

Administration

At the time of Diocletian, the diocese comprised 11 provinces:^[2][3]

• Achaea
• Crete
• Dacia Aureliana
• Dardania
• Epirus Nova
• Epirus Vetus
• Insulae
• Macedonia
• Moesia Superior
• Praevalitana
• Thessalia

After the split into Macedonia and Dacia

References

1. A Companion to Ancient Macedonia, page 548
2. A Companion to Ancient Macedonia, page 547
3. Handbook to life in ancient Rome