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
Transylvania Castle in Braşov County (14th century), the Hunyad Castle in Hunedoara (15th century). Notable writers such as Emil Cioran, Lucian Blaga, George Coșbuc, Octavian Goga and Liviu Rebreanu were born in Transylvania. The latter wrote the novel "Ion", which introduces the reader to a depiction of the life of the peasants and intellectuals of Transylvania at the turn of the 20th century. Transylvania has a very rich and unique religious history from the other regions of Europe. Since the Protestant Reformation, different Christian denominations coexist in this religious melting pot, including Romanian Orthodox, Romanian Greek Catholic, other Eastern Orthodox, Roman