This region was conquered by Celts (in the 4th century BC) and Romans (in the 1st century BC). The Celts founded the first fortress at this location, which was located on the right bank of the Danube. During Roman rule, a larger fortress was built in the 1st century AD with the name Cusum and was included into Roman province Pannonia. In the 5th century, Cusum was devastated by the invasion of the Huns.
