Pannonia was a

Byzantine 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 Constantinopl ...

province, which existed in present-day

Syrmia Syrmia ( sh, Srem/Срем or sh, Srijem/Сријем, label=none) is a region of the southern Pannonian Plain, which lies between the Danube and Sava rivers. It is divided between Serbia and Croatia. Most of the region is flat, with the exc ...

region of

Serbia Serbia (, ; Serbian: , , ), officially the Republic of Serbia ( Serbian: , , ), is a landlocked country in Southeastern and Central Europe, situated at the crossroads of the Pannonian Basin and the Balkans. It shares land borders with Hu ...

in the 6th century. Its capital was

Sirmium Sirmium was a city in the Roman province of Pannonia, located on the Sava river, on the site of modern Sremska Mitrovica in the Vojvodina autonomous provice of Serbia. First mentioned in the 4th century BC and originally inhabited by Illyria ...

(modern-day

Sremska Mitrovica Sremska Mitrovica (; sr-Cyrl, Сремска Митровица, hu, Szávaszentdemeter, la, Sirmium) is a city and the administrative center of the Srem District in the autonomous province of Vojvodina, Serbia. It is situated on the left ban ...

). It differed significantly in its area from the Roman province of Pannonia, and it was subordinate to the

Diocese of Dacia The Diocese of Dacia ( la, Dioecesis Daciae) was a diocese of the later Roman Empire, in the area of modern western Bulgaria, central Serbia, Montenegro, northern Albania and northern North Macedonia. It was subordinate to the Praetorian prefectu ...

Geography

The province was located between the

Danube The Danube ( ; ) is a river that was once a long-standing frontier of the Roman Empire and today connects 10 European countries, running through their territories or being a border. Originating in Germany, the Danube flows southeast for , pa ...

river in the north-east and

Sava The Sava (; , ; sr-cyr, Сава, hu, Száva) is a river in Central and Southeast Europe, a right-bank and the longest tributary of the Danube. It flows through Slovenia, Croatia and along its border with Bosnia and Herzegovina, and finally t ...

river in the south. The western border of Byzantine Pannonia stretched approximately to the estuary or river

Drina The Drina ( sr-Cyrl, Дрина, ) is a long Balkans river, which forms a large portion of the border between Bosnia and Herzegovina and Serbia. It is the longest tributary of the Sava River and the longest karst river in the Dinaric Alps whi ...

into Sava. Important cities in the area were

and

Bassianae Bassianae or Bassiana (Serbian: ''Basijana'' or Басијана) was an important ancient Roman town in Pannonia (today Syrmia region in Vojvodina province, Serbia). It was located near present-day Donji Petrovci, a village in the Ruma municip ...

. Byzantine Pannonia bordered Byzantine province of

Moesia Prima Moesia Prima (; Latin: ''Moesia''; el, Μοισία) was a frontier province of the late Roman Empire, situated in the central parts of present-day Serbia, along the south bank of the Danube River. Provincial capital was Viminacium, near modern ...

in the south and

Avar Khaganate The Pannonian Avars () were an alliance of several groups of Eurasian nomads of various origins. The peoples were also known as the Obri in chronicles of Rus, the Abaroi or Varchonitai ( el, Βαρχονίτες, Varchonítes), or Pseudo-Avars ...

in the west, north and east.

History

Background

Byzantine Pannonia succeeded the name of much bigger classical Roman province of

Pannonia Pannonia (, ) was a province of the Roman Empire bounded on the north and east by the Danube, coterminous westward with Noricum and upper Italy, and southward with Dalmatia and upper Moesia. Pannonia was located in the territory that is now west ...

. In other words, The Byzantine one covered only a small eastern part of ancient Roman

. In the 2nd century, the original Roman province was divided into two ones:

Pannonia Inferior Pannonia Inferior, lit. Lower Pannonia, was a province of the Roman Empire. Its capital was Sirmium. It was one of the border provinces on the Danube. It was formed in the year 103 AD by Emperor Trajan who divided the former province of Pannonia ...

and

Pannonia Superior Pannonia Superior, lit. Upper Pannonia, was a province of the Roman Empire. Its capital was Carnuntum. It was one on the border provinces on the Danube. It was formed in the year 103 AD by Emperor Trajan who divided the former province of P ...

. Subsequently, the area was subdivided into four provinces finally: Pannonia Prima, Pannonia Valeria,

Pannonia Savia Pannonia Savia or simply Savia, also known as Pannonia Ripariensis, was a Late Roman province. It was formed in the year 295, during the Tetrarchy reform of Roman emperor Diocletian, and assigned to the civil diocese of Pannonia, which was at ...

and Pannonia Secunda. Capital of Pannonia Secunda was

. In the middle of the 5th century, the territory of former Roman Pannonia was ceded to the

Huns The Huns were a nomadic people who lived in Central Asia, the Caucasus, and Eastern Europe between the 4th and 6th century AD. According to European tradition, they were first reported living east of the Volga River, in an area that was part ...

Theodosius II Theodosius II ( grc-gre, Θεοδόσιος, Theodosios; 10 April 401 – 28 July 450) was Roman emperor for most of his life, proclaimed ''augustus'' as an infant in 402 and ruling as the eastern Empire's sole emperor after the death of his ...

, and after the death of

Attila Attila (, ; ), frequently called Attila the Hun, was the ruler of the Huns from 434 until his death in March 453. He was also the leader of a tribal empire consisting of Huns, Ostrogoths, Alans, and Bulgars, among others, in Central and E ...

it successively passed (entirely or partially) into the hands of the

Ostrogoths The Ostrogoths ( la, Ostrogothi, Austrogothi) were a Roman-era Germanic people. In the 5th century, they followed the Visigoths in creating one of the two great Gothic kingdoms within the Roman Empire, based upon the large Gothic populations who ...

Lombards The Lombards () or Langobards ( la, Langobardi) were a Germanic people who ruled most of the Italian Peninsula from 568 to 774. The medieval Lombard historian Paul the Deacon wrote in the ''History of the Lombards'' (written between 787 an ...

and

Gepids The Gepids, ( la, Gepidae, Gipedae, grc, Γήπαιδες) were an East Germanic tribe who lived in the area of modern Romania, Hungary and Serbia, roughly between the Tisza, Sava and Carpathian Mountains. They were said to share the relig ...

. A contract from 510 assigned most of the territory of former Roman Pannonia (including

) to the

, while the eastern part of present-day

(which included the city of

) was assigned to 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 Constantinopl ...

. In 536, Sirmium was placed under the control of the

. The Lombard–Gepid War (567) ended with a Lombard- Avar victory and annihilation of Gepids, while Sirmium was retaken by the Byzantine Empire.

Under the Byzantine Empire

From 567 to 573,

was in a war with the Avars, who aimed to conquer Byzantine Pannonia. Temporary truce was declared in 573, but the war was resumed. Due to the fact that Byzantine-Persian war also started in this time, the Byzantine Empire was not able to defend Pannonia. The city of

was finally conquered by the Avars in 582, thus marking end of Roman control of Pannonia since Classical Antiquity.

Legacy

The Byzantine Empire re-established control over Pannonia in the 11th century, leading to the creation of the Theme of Sirmium to administer the region, but not lasting long.

References