The Theme of Thessalonica ( el, Θέμα Θεσσαλονίκης) was a military-civilian province (''thema'' or
theme) of the
Byzantine Empire
The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantin ...
located in the southern
Balkans
The Balkans ( ), also known as the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throughout the who ...
, comprising varying parts of
Central and
Western Macedonia
Western Macedonia ( el, Δυτική Μακεδονία, translit=Ditikí Makedonía, ) is one of the thirteen Modern regions of Greece, regions of Greece, consisting of the western part of Macedonia (Greece), Macedonia. Located in north-western ...
and centred on
Thessalonica
Thessaloniki (; el, Θεσσαλονίκη, , also known as Thessalonica (), Saloniki, or Salonica (), is the second-largest city in Greece, with over one million inhabitants in its metropolitan area, and the capital of the geographic region ...
, the Empire's second-most important city.
History
In
Late Antiquity
Late antiquity is the time of transition from classical antiquity to the Middle Ages, generally spanning the 3rd–7th century in Europe and adjacent areas bordering the Mediterranean Basin. The popularization of this periodization in English has ...
, Thessalonica was the capital of the
Roman province
The Roman provinces (Latin: ''provincia'', pl. ''provinciae'') were the administrative regions of Ancient Rome outside Roman Italy that were controlled by the Romans under the Roman Republic and later the Roman Empire. Each province was rule ...
of
Macedonia
Macedonia most commonly refers to:
* North Macedonia, a country in southeastern Europe, known until 2019 as the Republic of Macedonia
* Macedonia (ancient kingdom), a kingdom in Greek antiquity
* Macedonia (Greece), a traditional geographic reg ...
and of the