What is "illyricum"

Illyricum can refer to:

• Illyria, a region in the Balkans in classical antiquity, inhabited by ancient Illyrians
• Illyricum (Roman province), a Roman province that existed between 167 BC and 10 AD
• Diocese of Illyricum, a diocese of the Late Roman Empire
• Praetorian prefecture of Illyricum, one of four praetorian prefectures into which the Late Roman Empire was divided

Illyricum was a Roman province that existed form 27 BC to sometime during the reign of Vespasian (79-89 BC). The province comprised Illyria/Dalmatia and Pannonia. Illyria included the area along the east coast of the Adriatic Sea and its inland mountains. With the creation of this province it came to be called Dalmatia. It was in the south. Pannonia was in the north. Illyria/Dalmatia stretched from the River Drin (in modern northern Albania) to Istria ( Croatia) and the River Sava in the north. The area roughly corresponded to modern northern Albania, Montenegro, Bosnia and Herzegovina and coastal Croatia. Pannonia was the plain which lie to its north, from the mountains of Illyria/Dalmatia to the westward bend of the River Danube. It was in the modern Vojvodina (in northern Serbia), northern Croatia and western Hungary. As the province developed Salona (near modern Split, Croatia) became as its capital.