However, the Coruña tradition maintains that the "port" of Betanzos (which is a fluvial one, in a quite small river) was far too small for Roman warships to dock at, for example when Julius Caesar visited this area with "more than a hundred triremes". It is demonstrated that Corunna was an important Roman site, as graveyards and other Roman remains have been found in the city centre, demonstrating that the site was inhabited in the Roman period, and was deserted only during the early Middle Ages due to Viking attacks, when its people moved inland to O Burgo (now Culleredo). The proponents of Corunna also explain the different name as a change that occurred in the Middle Ages, and point out that the lighthouse, which was called "Pharum Brigantium", was erected in Corunna, and is at least 25 km (or a day's walk) from Betanzos.