Celts in Transylvania arrived in northwestern Transylvania in around 400–350 BC as part of their great migration eastwards. When Celtic warriors first penetrated these territories, the group seem to have merged with the domestic population of early Dacians and assimilated many Hallstatt cultural traditions. The second half of the 4th century BC saw the Middle La Tène Celtic culture emerge in north-western and central Dacia, a development reflected especially in burials of the period. Celtic artifacts dating to this time have been discovered at Turdaş, Haţeg and Mediaş in modern-day Romania. By 1976, the number of Celtic sites found in Transylvania had reached
History of Transylvania 895. This is supported by an eleventh-century Russian tradition that the Hungarians moved to the Carpathian Basin by way of Kiev. However, according to Florin Curta no evidence exists of Magyars crossing Eastern Carpathian Mountains into Transylvania. According to supporters of the Daco-Roman continuity theory, Transylvania was populated by Romanians at the time of the Hungarian conquest. Opponents of this theory assert that Transylvania was sparsely inhabited by peoples of Slavic origin and Turkic people. The year of the conquest of Transylvania is unknown; the earliest Magyar artifacts found in the region date to the first half of the 10th