Born in 232 in Sirmium ( modern day Sremska Mitrovica ), Pannonia Inferior, the son of Dalmatius, Probus entered the army around 250 upon reaching adulthood.

Maximian was born near Sirmium ( modern Sremska Mitrovica, Serbia ) in the province of Pannonia, around 250 into the family of shopkeepers.

The Hunnish army, having sacked Margus and Viminacium, took Singidunum ( modern Belgrade ) and Sirmium ( modern Sremska Mitrovica ) before halting.

The Romans continued the expansion of Singidunum ( modern capital Belgrade ), Sirmium ( Sremska Mitrovica ) and Naissus ( Niš ), among other centres, and a few notable remnants of monuments survive, such as Via Militaris, Trajan's Bridge, Diana, Felix Romuliana ( UNESCO ), etc.

In 293, with the establishment of tetrarchy, the Roman Empire was split into four parts ; Sirmium became one of the four capital cities of Roman Empire, the other three being Augusta Treverorum, Mediolanum, and Nicomedia ( modern Trier, Milan and Izmit ).

Sirmium was located on the Sava river, on the site of modern Sremska Mitrovica in Vojvodina province, northern Serbia.

Remains of Sirmium are situated on the locality of the modern day Sremska Mitrovica, 55 km west of Belgrade ( Roman Singidunum ) and 145 km away from Kostolac ( Roman Viminacium ).

In reply, Hosius sent his courageous letter of protest against imperial interference in Church affairs ( 353 ), preserved by Athanasius which led to Hosius ' exile in 355 to Sirmium, an imperial center in Pannonia ( in modern Serbia ).

It became one of the primary settlements of Moesia, situated between Sirmium ( modern Sremska Mitrovica ) and Viminacium ( modern Kostolac ), both of which overshadowed Singidunum in significance, and just across the Sava River from Taurunum ( modern Zemun ) in Pannonia.

Diocletian spent the spring of 293 traveling with Galerius from Sirmium ( Sremska Mitrovica, Serbia ) to Byzantium ( Istanbul, Turkey ).

* Sirmium ( Sremska Mitrovica, in present-day Serbia )

Probus ' army, stationed in Sirmium ( Sremska Mitrovica, Serbia ), decided they did not wish to fight Carus, and assassinated Probus instead.

Gratian was the son of Emperor Valentinian I by Marina Severa, and was born at Sirmium ( now Sremska Mitrovica, Serbia ) in Pannonia.

| PLACE OF BIRTH = Sirmium ( Sremska Mitrovica, Serbia )

Antoninianus of Trajan DeciusDecius, who was born at Budalia, now Martinci, Serbia near Sirmium ( Sremska Mitrovica ), in Lower Pannonia was one of the first among a long succession of future Roman Emperors to originate from the province of Illyricum in the Danube.

Wilten, near Innsbruck ), from which branched off the road into Noricum, leading by Virunum ( Klagenfurt ) to Laurieum ( Lorch ) on the Danube, the road into Pannonia, leading to Aemona ( Ljubljana ) and Sirmium ( Sremska Mitrovica ), the road to Tarsatica ( near Fiume, now Rijeka ) and Siscia ( Sisak ), and that to Tergeste ( Trieste ) and the Istrian coast.

* Serbia: Sremska kobasica, Sremska salama, Sremski kulen ( after the region of Srem / Sirmium ), Požarevačka kobasica ( after the city of Požarevac )

Operating from Sirmium ( today Sremska Mitrovica, Vojvodina, Serbia ) on the Sava river, Marcus Aurelius moved against the Iazyges personally.

Herennius was born in near Sirmium in Pannonia ( now Sremska Mitrovica, Serbia ), during one of his father's military postings.

The northern Serbian city of Sirmium ( Sremska Mitrovica ) was among the top 4 cities of the late Roman Empire, serving as its capital during the Tetrarchy.

In Serbian, the town is known as Сремска Митровица or Sremska Mitrovica, in Rusyn as Сримска Митровица, in Croatian as Srijemska Mitrovica, in Hungarian as Szávaszentdemeter or Mitrovica, in German as Syrmisch Mitrowitz, in Latin as Sirmium, and in Turkish as Dimitrofça.

During work on the new Sremska Mitrovica trade center in 1972, a worker accidentally broke into an old Roman pot, about 2m deep, over the site of an old Sirmium settlement.

A colossal building about 150m wide and 450m long lays directly under the Sremska Mitrovica town center and just beside the old Sirmium Emperor's Palace ( one of just a few Sirmium publicly accessible archeological sights ).

The presence of the arena has clearly affected the layout of the present town ( Sremska Mitrovica is today about 2-4m above ground line of the former Sirmium settlement ).

* KAF Sirmium Legionaries, an American Football club from Sremska Mitrovica.

The name Syrmia derives from the name of the ancient city of Sirmium, today Sremska Mitrovica.

Golden Roman helmet found near Sirmium ; it has been exhibited in the Museum of Vojvodina in Novi Sad.

Three golden helmets found near Sirmium, " kept " by 80 Roman legionnaires, Museum of Vojvodina in Novi Sad

As for the names of the three historical and geographical regions of which Vojvodina is composed, Syrmia was named after the ancient Roman city of Sirmium, Bačka was named after the town of Bač, and Banat was named after the ruling title Ban.

The Gepids obtained the support of the Emperor in exchange for a promise to cede him the region of Sirmium, the seat of the Gepid kings.

The Byzantines were confirmed in their control of Braničevo, Belgrade and Zemun and they also recovered the region of Sirmium ( called Frangochorion in Choniates ), which had been Hungarian since the 1060s.

The region was annexed by the Byzantine Empire after 969, becoming part of the katepanate of Ras, then the Theme of Sirmium.

The short-lived Thema of Sirmium was established, including both the region of Syrmia and the present-day region of Mačva, thus the name of Syrmia became designation for the both territories.

In the 11th century, the Byzantine province known as the Theme of Sirmium included both, the present-day region of Srem and Mačva, thus the name of Srem became designation for the both regions.

Some researches are also trying to connect Serb name with other somewhat similar names such are Siberia ( region in Russia ), Sibiru ( island near Sumatra ), Seri or Sereri ( ancient people in Central Asia ), Montes Serrorum ( old name for Carpathians ), Sarmatia ( ancient region in Eastern Europe ), Sirmium ( city in ancient Pannonia ), etc.

* Sirmium Wallachia, a region on the Sava River

After ten years of uneasy, undocumented peace, Bayan again marched against Sirmium, wresting it from Byzantine hands after a two-year siege, then took also Singidunum, evicting the Byzantines from the inner Balkans and opening the area to an unstoppable influx of Slavs, that in five years at most flooded all the semi-abandoned region down to the Peloponnesus.

After the Erdut Agreement was signed in 1995, the United Nations Transitional Authority for Eastern Slavonia, Baranja and Western Sirmium ( UNTAES ) was established to enable the return of Croatian refugees and to prepare the region for reintegration into Croatia.

He halts for four days at Sirmium ( Serbia ) suffering from fever.

Golden Galea ( helmet ) | Roman helmet found near Sirmium ( Serbia )

** Sirmium ( Serbia, on the Danube border ) becomes the capital of Galerius

* Emperor Probus travels towards Sirmium ( Serbia ).

There were many famous royal cities and palaces in Serbia at the time of Roman Empire and early Byzantine Empire, traces of which can still be found in Sirmium, Gamzigrad and Justiniana Prima.

It may have been located either at Staré Město ( Czech Republic ) whose name literally means " old city " in Czech, or at Nitra ( Slovakia ), but it has also been identified with Sirmium ( Sremska Mitrovica, Serbia ).

Marcus Aurelius wrote Meditations in Greek language | Greek at his base in Sirmium in modern-day Serbia and also while positioned at Aquincum on campaign in Pannonia in modern-day Hungary

In 869 Pope Hadrian II who had decided to revive the archdiocese of Illyricum consecrated Methodius archbishop of Sirmium ( Sremska Mitrovica, Serbia ) and papal legate of all the Slavs living in the territories ruled by Rastislav, Svatopluk and Pribina's son, Koceľ.

His residence was in Sirmium ( today Sremska Mitrovica, Serbia ), where he produced his own golden coins.