Sirmium (theme)

Theme of Sirmium
Σίρμιο, θέμα Σιρμίου
Theme of Byzantine Empire

Map of Theme Sirmium within Byzantine Empire in 1025.
CapitalSirmium
 • TypeTheme
Historical eraMiddle Ages
• Annexation
1018
Preceded by
Succeeded by
Image missing Duchy of Sermon
Pannonia, Byzantine Empire
Catepanate of Ras
Syrmia County (medieval)
Grand Principality of Serbia

The Theme of Sirmium (Greek: θέμα Σιρμίου) was a Byzantine administrative unit (theme), which existed in present-day Serbia, Croatia and Bosnia and Herzegovina in the 11th century. Its capital was Sirmium (today Sremska Mitrovica).


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