Pannonia was a province of the Roman Empire bounded on the north and east by the Danube, on the west by Noricum and upper Italy, and on the south by Dalmatia and upper Moesia. It included the modern regions of western Hungary, western Slovakia, eastern Austria, northern Croatia, north-western Serbia, northern Slovenia, and northern Bosnia and Herzegovina. The northern and eastern boundary line of Pannonia was formed by the River Danube.
