The oldest settlement in Europe. It is a city with a very rich architectural, cultural, and traditional heritage. Most prehistoric settlements were located on the high left bank, and the largest and longest-lasting settlement was formed at the right mouth of the Ervenica stream into the Bosut, at the “Telo Tržnica.” Colonia Aurelia Cibalae was the third-largest city in the province of Pannonia Secunda, which stretched over the present-day areas of Slavonia, Syrmia, and Baranja, after the capital of Sirmium (S. Mitrovica) and Mursa (Osijek).

An prominent feature among the numerous important details in the city’s past is certainly the oldest Indo-European calendar, Orion.