Diocese of Macedonia

Diocese of Macedonia Dioecesis Macedoniae Διοίκησις Μακεδονίας
Diocese of the Roman Empire
306-7th century
Capital		Thessaloniki
Historical era		Late Antiquity
•	Reforms of Diocletian	306
•	Thessaloniki became the Prefecture's new capital city	379
•	Slavic invasion of the Balkans	7th century
Today part of		Albania Greece Macedonia

The Diocese of Macedonia (Latin: Dioecesis Macedoniae, Greek: Διοίκησις Μακεδονίας) was a diocese of the later Roman Empire, forming part of the praetorian prefecture of Illyricum. Its administrative centre was Thessaloniki.

The diocese was formed, probably under Constantine I (r. 306–337), from the division of the Diocletianian Diocese of Moesia. It included the provinces of Macedonia Prima, Macedonia Secunda or Salutaris (periodically abolished), Thessalia, Epirus vetus, Epirus nova, Achaea, and Crete. Alongside Dacia and, up until 379, Pannonia, it made up the Prefecture of Illyricum. In 379, Pannonia was detached and merged into the Praetorian prefecture of Italy and Thessaloniki became the Prefecture's new capital city instead of Sirmium.

Sources

• Notitia dignitatum, Pars Orientalis, III
• Joseph Roisman, Ian Worthington, A Companion to Ancient Macedonia,

See also

• Macedonia (terminology)
• Macedonia (Roman province)
• Macedonia (theme)