 When Tiberius, later the Roman Emperor, overran Transdanubia in AD 9, he established a military camp and civilian settlement in the area of present-day Lébény.In later centuries the region was inhabited by Huns, then by Lombards, and then by Avars, who were converted to Christianity.Excavations have confirmed there was already a sizeable community at Lébény at the time of the Hungarian Conquest of the Carpathian Basin in the 9th and 10th centuries, including Slavic groups.