For three hundred years the Danube here was the edge of the Roman Empire. The legionary base of Brigetio lay on the far bank, near today's Hungarian Komárom, and seven kilometres east of Komárno, at Iža, the Romans built a bridgehead fort on this side of the water; archaeologists call it Kelemantia. It began as earth and timber under the emperor Marcus Aurelius, was burned by Germanic raiders within a few years, was rebuilt in stone, and was finally given up around the year 400. After Rome came the Avars: eight of their cemeteries, from the years between 568 and 791, have been dug up inside the town itself.Dunaj tu tri storočia tvoril hranicu Rímskej ríše. Na druhom brehu, pri dnešnom maďarskom Komárome, stál legionársky tábor Brigetio a sedem kilometrov východne od Komárna, pri Iži, si Rimania postavili predmostie aj na tejto strane vody — archeológovia ho volajú Kelemantia. Najprv to bol tábor z dreva a hliny z čias cisára Marca Aurelia, germánsky nájazd ho po niekoľkých rokoch zničil, obnovili ho z kameňa a okolo roku 400 ho definitívne opustili. Po Rimanoch prišli Avari: priamo na území mesta sa našlo osem ich pohrebísk z rokov 568 až 791.
