The Theme of Thessalonica (Greek: Θέμα Θεσσαλονίκης) was a military-civilian province (thema or theme) of the Byzantine Empire located in the southern Balkans, comprising varying parts of Central and Western Macedonia and centred on Thessalonica, the Empire's second-most important city. == History == In Late Antiquity, Thessalonica was the capital of the Roman province of Macedonia and of the Diocese of Macedonia, and the seat of the praetorian prefect of Illyricum.
The Theme of Thessalonica (Greek: Θέμα Θεσσαλονίκης) was a military-civilian province (thema or theme) of the Byzantine Empire located in the southern Balkans, comprising varying parts of Central and Western Macedonia and centred on Thessalonica, the Empire's second-most important city. == History == In Late Antiquity, Thessalonica was the capital of the Roman province of Macedonia and of the Diocese of Macedonia, and the seat of the praetorian prefect of Illyricum.
Source: Wikipedia "Thessalonica (theme)" · CC BY-SA 4.0
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