The city of Chester was also historically called Caerleon. For the champion racehorse, see Caerleon IICaerleon (/kərˈliːən/; Welsh: Caerllion) is a suburban village and community, situated on the River Usk in the northern outskirts of the city of Newport, Wales. Caerleon is a site of archaeological importance, being the site of a notable Roman legionary fortress, Isca Augusta, and an Iron Age hill fort.