The oldest settlement in Europe. It is a city with a very rich architectural, cultural and traditional heritage. Most prehistoric settlements are locatedhere, and the largest and longest-lived settlements were here. Colonia Aurelia Cibalae was the third largest city in the province of Pannonia Sekundi, extending into present-day Slavonia, Srijem and Baranja, after the capital of Sirmium (S. Mitrovica) and Mursa (Osijek).
The oldest Indo-European calendar, Orion was used here.