Definition: Pannonia was the Roman name of a country of Europe that is now Hungary. The Danube River borders Pannonia on the north and east, and Illyricum and Moesia border it on the south. Pannonia was divided in two with an Upper and Lower Pannonia. The name of the Roman province crops up often in the history of the Roman Empire.
In A.D. 107 the future emperor Hadrian was made governor of Lower Pannonia. Septimius Severus, governor of Upper Pannonia, was declared emperor in Pannonia. The Battle of Cibalae (A.D. 314 or 316) was fought between Constantine and Licinius in Pannonia. The future emperor Valentinian I was born in Pannonia. In A.D. 403 in the settlement made between Stilicho and the Goths under Alaric, the Goths were to settle between Dalmatia and Pannonia. Martin of Tours came from Pannonia.
